stable/tests/test_persistence_long.py

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2021-07-02 08:48:30 +00:00
import logging
from datetime import datetime, timedelta, timezone
from pathlib import Path
from types import FunctionType
from unittest.mock import MagicMock
import arrow
import pytest
from math import isclose
from sqlalchemy import create_engine, inspect, text
from freqtrade import constants
from freqtrade.exceptions import DependencyException, OperationalException
from freqtrade.persistence import LocalTrade, Order, Trade, clean_dry_run_db, init_db
from tests.conftest import create_mock_trades_with_leverage, log_has, log_has_re
@pytest.mark.usefixtures("init_persistence")
def test_update_with_binance(limit_leveraged_buy_order, limit_leveraged_sell_order, fee, ten_minutes_ago, caplog):
"""
10 minute leveraged limit trade on binance at 3x leverage
Leveraged trade
fee: 0.25% base
interest_rate: 0.05% per day
open_rate: 0.00001099 base
close_rate: 0.00001173 base
amount: 272.97543219 crypto
stake_amount: 0.0009999999999226999 base
borrowed: 0.0019999999998453998 base
time-periods: 10 minutes(rounds up to 1/24 time-period of 1 day)
interest: borrowed * interest_rate * time-periods
= 0.0019999999998453998 * 0.0005 * 1/24 = 4.166666666344583e-08 base
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (272.97543219 * 0.00001099) + (272.97543219 * 0.00001099 * 0.0025)
= 0.0030074999997675204
close_value: (amount_closed * close_rate) - (amount_closed * close_rate * fee)
= (272.97543219 * 0.00001173) - (272.97543219 * 0.00001173 * 0.0025)
= 0.003193996815039728
total_profit = close_value - open_value - interest
= 0.003193996815039728 - 0.0030074999997675204 - 4.166666666344583e-08
= 0.00018645514860554435
total_profit_percentage = total_profit / stake_amount
= 0.00018645514860554435 / 0.0009999999999226999
= 0.18645514861995735
"""
trade = Trade(
id=2,
pair='ETH/BTC',
stake_amount=0.0009999999999226999,
open_rate=0.01,
amount=5,
is_open=True,
open_date=ten_minutes_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
# borrowed=90.99181073,
interest_rate=0.0005,
exchange='binance'
)
# assert trade.open_order_id is None
assert trade.close_profit is None
assert trade.close_date is None
assert trade.borrowed is None
assert trade.is_short is None
# trade.open_order_id = 'something'
trade.update(limit_leveraged_buy_order)
# assert trade.open_order_id is None
assert trade.open_rate == 0.00001099
assert trade.close_profit is None
assert trade.close_date is None
assert trade.borrowed == 0.0019999999998453998
assert trade.is_short is True
assert log_has_re(r"LIMIT_BUY has been fulfilled for Trade\(id=2, "
r"pair=ETH/BTC, amount=272.97543219, open_rate=0.00001099, open_since=.*\).",
caplog)
caplog.clear()
# trade.open_order_id = 'something'
trade.update(limit_leveraged_sell_order)
# assert trade.open_order_id is None
assert trade.close_rate == 0.00001173
assert trade.close_profit == 0.18645514861995735
assert trade.close_date is not None
assert log_has_re(r"LIMIT_SELL has been fulfilled for Trade\(id=2, "
r"pair=ETH/BTC, amount=272.97543219, open_rate=0.00001099, open_since=.*\).",
caplog)
@pytest.mark.usefixtures("init_persistence")
def test_update_market_order(limit_leveraged_buy_order, limit_leveraged_sell_order, fee, ten_minutes_ago, caplog):
"""
10 minute leveraged market trade on Kraken at 3x leverage
Short trade
fee: 0.25% base
interest_rate: 0.05% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
amount: 91.99181073 * leverage(3) = 275.97543219 crypto
stake_amount: 0.0037707443218227
borrowed: 0.0075414886436454 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1 = 3.7707443218227e-06 crypto
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (275.97543219 * 0.00004099) + (275.97543219 * 0.00004099 * 0.0025)
= 0.01134051354788177
close_value: (amount_closed * close_rate) - (amount_closed * close_rate * fee)
= (275.97543219 * 0.00004173) - (275.97543219 * 0.00004173 * 0.0025)
= 0.011487663648325479
total_profit = close_value - open_value - interest
= 0.011487663648325479 - 0.01134051354788177 - 3.7707443218227e-06
= 0.0001433793561218866
total_profit_percentage = total_profit / stake_amount
= 0.0001433793561218866 / 0.0037707443218227
= 0.03802415223225211
"""
trade = Trade(
id=1,
pair='ETH/BTC',
stake_amount=0.0037707443218227,
amount=5,
open_rate=0.01,
is_open=True,
leverage=3,
fee_open=fee.return_value,
fee_close=fee.return_value,
open_date=ten_minutes_ago,
interest_rate=0.0005,
exchange='kraken'
)
trade.open_order_id = 'something'
trade.update(limit_leveraged_buy_order)
assert trade.leverage == 3.0
assert trade.is_short == True
assert trade.open_order_id is None
assert trade.open_rate == 0.00004099
assert trade.close_profit is None
assert trade.close_date is None
assert trade.interest_rate == 0.0005
# TODO: Uncomment the next assert and make it work.
# The logger also has the exact same but there's some spacing in there
assert log_has_re(r"MARKET_BUY has been fulfilled for Trade\(id=1, "
r"pair=ETH/BTC, amount=275.97543219, open_rate=0.00004099, open_since=.*\).",
caplog)
caplog.clear()
trade.is_open = True
trade.open_order_id = 'something'
trade.update(limit_leveraged_sell_order)
assert trade.open_order_id is None
assert trade.close_rate == 0.00004173
assert trade.close_profit == 0.03802415223225211
assert trade.close_date is not None
# TODO: The amount should maybe be the opening amount + the interest
# TODO: Uncomment the next assert and make it work.
# The logger also has the exact same but there's some spacing in there
assert log_has_re(r"MARKET_SELL has been fulfilled for Trade\(id=1, "
r"pair=ETH/BTC, amount=275.97543219, open_rate=0.00004099, open_since=.*\).",
caplog)
@pytest.mark.usefixtures("init_persistence")
def test_calc_open_close_trade_price(limit_leveraged_buy_order, limit_leveraged_sell_order, five_hours_ago, fee):
"""
5 hour leveraged trade on Binance
fee: 0.25% base
interest_rate: 0.05% per day
open_rate: 0.00001099 base
close_rate: 0.00001173 base
amount: 272.97543219 crypto
stake_amount: 0.0009999999999226999 base
borrowed: 0.0019999999998453998 base
time-periods: 5 hours(rounds up to 5/24 time-period of 1 day)
interest: borrowed * interest_rate * time-periods
= 0.0019999999998453998 * 0.0005 * 5/24 = 2.0833333331722917e-07 base
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (272.97543219 * 0.00001099) + (272.97543219 * 0.00001099 * 0.0025)
= 0.0030074999997675204
close_value: (amount_closed * close_rate) - (amount_closed * close_rate * fee)
= (272.97543219 * 0.00001173) - (272.97543219 * 0.00001173 * 0.0025)
= 0.003193996815039728
total_profit = close_value - open_value - interest
= 0.003193996815039728 - 0.0030074999997675204 - 2.0833333331722917e-07
= 0.00018628848193889054
total_profit_percentage = total_profit / stake_amount
= 0.00018628848193889054 / 0.0009999999999226999
= 0.18628848195329067
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.0009999999999226999,
open_rate=0.01,
amount=5,
open_date=five_hours_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='binance',
interest_rate=0.0005
)
trade.open_order_id = 'something'
trade.update(limit_leveraged_buy_order)
assert trade._calc_open_trade_value() == 0.0030074999997675204
trade.update(limit_leveraged_sell_order)
# Will be slightly different due to slight changes in compilation time, and the fact that interest depends on time
assert round(trade.calc_close_trade_value(), 11) == round(0.003193996815039728, 11)
# Profit in BTC
assert round(trade.calc_profit(), 8) == round(0.18628848195329067, 8)
# Profit in percent
# assert round(trade.calc_profit_ratio(), 11) == round(0.05822425142973869, 11)
@pytest.mark.usefixtures("init_persistence")
def test_trade_close(fee, five_hours_ago):
"""
5 hour leveraged market trade on Kraken at 3x leverage
fee: 0.25% base
interest_rate: 0.05% per 4 hrs
open_rate: 0.1 base
close_rate: 0.2 base
amount: 5 * leverage(3) = 15 crypto
stake_amount: 0.5
borrowed: 1 base
time-periods: 5/4 periods of 4hrs
interest: borrowed * interest_rate * time-periods
= 1 * 0.0005 * 5/4 = 0.000625 crypto
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (15 * 0.1) + (15 * 0.1 * 0.0025)
= 1.50375
close_value: (amount_closed * close_rate) + (amount_closed * close_rate * fee)
= (15 * 0.2) - (15 * 0.2 * 0.0025)
= 2.9925
total_profit = close_value - open_value - interest
= 2.9925 - 1.50375 - 0.000625
= 1.4881250000000001
total_profit_percentage = total_profit / stake_amount
= 1.4881250000000001 / 0.5
= 2.9762500000000003
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.1,
open_rate=0.01,
amount=5,
is_open=True,
fee_open=fee.return_value,
fee_close=fee.return_value,
open_date=five_hours_ago,
exchange='kraken',
leverage=3.0,
interest_rate=0.0005
)
assert trade.close_profit is None
assert trade.close_date is None
assert trade.is_open is True
trade.close(0.02)
assert trade.is_open is False
assert trade.close_profit == round(2.9762500000000003, 8)
assert trade.close_date is not None
# TODO-mg: Remove these comments probably
# new_date = arrow.Arrow(2020, 2, 2, 15, 6, 1).datetime,
# assert trade.close_date != new_date
# # Close should NOT update close_date if the trade has been closed already
# assert trade.is_open is False
# trade.close_date = new_date
# trade.close(0.02)
# assert trade.close_date == new_date
@pytest.mark.usefixtures("init_persistence")
def test_calc_close_trade_price_exception(limit_leveraged_buy_order, fee):
trade = Trade(
pair='ETH/BTC',
stake_amount=0.001,
open_rate=0.1,
amount=5,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='binance',
interest_rate=0.0005,
borrowed=0.002
)
trade.open_order_id = 'something'
trade.update(limit_leveraged_buy_order)
assert trade.calc_close_trade_value() == 0.0
@pytest.mark.usefixtures("init_persistence")
def test_update_open_order(limit_leveraged_buy_order):
trade = Trade(
pair='ETH/BTC',
stake_amount=1.00,
open_rate=0.01,
amount=5,
fee_open=0.1,
fee_close=0.1,
interest_rate=0.0005,
borrowed=2.00,
exchange='binance',
)
assert trade.open_order_id is None
assert trade.close_profit is None
assert trade.close_date is None
limit_leveraged_buy_order['status'] = 'open'
trade.update(limit_leveraged_buy_order)
assert trade.open_order_id is None
assert trade.close_profit is None
assert trade.close_date is None
@pytest.mark.usefixtures("init_persistence")
def test_calc_open_trade_value(market_leveraged_buy_order, ten_minutes_ago, fee):
"""
10 minute leveraged market trade on Kraken at 3x leverage
Short trade
fee: 0.25% base
interest_rate: 0.05% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
amount: 91.99181073 * leverage(3) = 275.97543219 crypto
stake_amount: 0.0037707443218227
borrowed: 0.0075414886436454 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1 = 3.7707443218227e-06 crypto
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (275.97543219 * 0.00004099) + (275.97543219 * 0.00004099 * 0.0025)
= 0.01134051354788177
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.001,
amount=5,
open_rate=0.00004099,
open_date=ten_minutes_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
interest_rate=0.0005,
exchange='kraken',
leverage=3
)
trade.open_order_id = 'open_trade'
trade.update(market_leveraged_buy_order) # Buy @ 0.00001099
# Get the open rate price with the standard fee rate
assert trade._calc_open_trade_value() == 0.01134051354788177
trade.fee_open = 0.003
# Get the open rate price with a custom fee rate
assert trade._calc_open_trade_value() == 0.011346169664364504
@pytest.mark.usefixtures("init_persistence")
def test_calc_close_trade_price(market_leveraged_buy_order, market_leveraged_sell_order, ten_minutes_ago, fee):
"""
10 minute leveraged market trade on Kraken at 3x leverage
Short trade
fee: 0.25% base
interest_rate: 0.05% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
amount: 91.99181073 * leverage(3) = 275.97543219 crypto
stake_amount: 0.0037707443218227
borrowed: 0.0075414886436454 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1 = 3.7707443218227e-06 crypto
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (275.97543219 * 0.00004099) + (275.97543219 * 0.00004099 * 0.0025)
= 0.01134051354788177
close_value: (amount_closed * close_rate) - (amount_closed * close_rate * fee)
= (275.97543219 * 0.00001234) - (275.97543219 * 0.00001234 * 0.0025) = 0.0033970229911415386
= (275.97543219 * 0.00001234) - (275.97543219 * 0.00001234 * 0.003) = 0.0033953202227249265
= (275.97543219 * 0.00004173) - (275.97543219 * 0.00004173 * 0.005) = 0.011458872511362258
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.001,
amount=5,
open_rate=0.00001099,
fee_open=fee.return_value,
fee_close=fee.return_value,
open_date=ten_minutes_ago,
interest_rate=0.0005,
is_short=True,
leverage=3.0,
exchange='kraken',
)
trade.open_order_id = 'close_trade'
trade.update(market_leveraged_buy_order) # Buy @ 0.00001099
# Get the close rate price with a custom close rate and a regular fee rate
assert isclose(trade.calc_close_trade_value(rate=0.00001234), 0.0033970229911415386)
# Get the close rate price with a custom close rate and a custom fee rate
assert isclose(trade.calc_close_trade_value(rate=0.00001234, fee=0.003), 0.0033953202227249265)
# Test when we apply a Sell order, and ask price with a custom fee rate
trade.update(market_leveraged_sell_order)
assert isclose(trade.calc_close_trade_value(fee=0.005), 0.011458872511362258)
@pytest.mark.usefixtures("init_persistence")
def test_calc_profit(market_leveraged_buy_order, market_leveraged_sell_order, ten_minutes_ago, five_hours_ago, fee):
"""
# TODO: Update this one
Leveraged trade on Kraken at 3x leverage
fee: 0.25% base or 0.3%
interest_rate: 0.05%, 0.25% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
stake_amount: 0.0037707443218227
amount: 91.99181073 * leverage(3) = 275.97543219 crypto
borrowed: 0.0075414886436454 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
5 hours = 5/4
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1 = 3.7707443218227e-06 crypto
= 0.0075414886436454 * 0.00025 * 5/4 = 2.3567152011391876e-06 crypto
= 0.0075414886436454 * 0.0005 * 5/4 = 4.713430402278375e-06 crypto
= 0.0075414886436454 * 0.00025 * 1 = 1.88537216091135e-06 crypto
open_value: (amount * open_rate) + (amount * open_rate * fee)
= (275.97543219 * 0.00004099) + (275.97543219 * 0.00004099 * 0.0025) = 0.01134051354788177
close_value: (amount_closed * close_rate) - (amount_closed * close_rate * fee)
(275.97543219 * 0.00005374) - (275.97543219 * 0.00005374 * 0.0025) = 0.014793842426575873
(275.97543219 * 0.00000437) - (275.97543219 * 0.00000437 * 0.0025) = 0.0012029976070736241
(275.97543219 * 0.00005374) - (275.97543219 * 0.00005374 * 0.003) = 0.014786426966712927
(275.97543219 * 0.00000437) - (275.97543219 * 0.00000437 * 0.003) = 0.0012023946007542888
total_profit = close_value - open_value
= 0.014793842426575873 - 0.01134051354788177 = 0.003453328878694104
= 0.0012029976070736241 - 0.01134051354788177 = -0.010137515940808145
= 0.014786426966712927 - 0.01134051354788177 = 0.0034459134188311574
= 0.0012023946007542888 - 0.01134051354788177 = -0.01013811894712748
total_profit_percentage = total_profit / stake_amount
0.003453328878694104/0.0037707443218227 = 0.9158215418394733
-0.010137515940808145/0.0037707443218227 = -2.6884654793852154
0.0034459134188311574/0.0037707443218227 = 0.9138549646255183
-0.01013811894712748/0.0037707443218227 = -2.6886253964381557
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.0038388182617629,
amount=5,
open_rate=0.00004099,
open_date=ten_minutes_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='kraken',
leverage=3.0,
interest_rate=0.0005
)
trade.open_order_id = 'something'
trade.update(market_leveraged_buy_order) # Buy @ 0.00001099
# Custom closing rate and regular fee rate
# Higher than open rate
assert trade.calc_profit(rate=0.00004374, interest_rate=0.0005) == round(
0.003453328878694104, 8)
assert trade.calc_profit_ratio(
rate=0.00004374, interest_rate=0.0005) == round(0.9158215418394733, 8)
# Lower than open rate
trade.open_date = five_hours_ago
assert trade.calc_profit(
rate=0.00000437, interest_rate=0.00025) == round(-0.010137515940808145, 8)
assert trade.calc_profit_ratio(
rate=0.00000437, interest_rate=0.00025) == round(-2.6884654793852154, 8)
# Custom closing rate and custom fee rate
# Higher than open rate
assert trade.calc_profit(rate=0.00004374, fee=0.003,
interest_rate=0.0005) == round(0.0034459134188311574, 8)
assert trade.calc_profit_ratio(rate=0.00004374, fee=0.003,
interest_rate=0.0005) == round(0.9138549646255183, 8)
# Lower than open rate
trade.open_date = ten_minutes_ago
assert trade.calc_profit(rate=0.00000437, fee=0.003,
interest_rate=0.00025) == round(-0.01013811894712748, 8)
assert trade.calc_profit_ratio(rate=0.00000437, fee=0.003,
interest_rate=0.00025) == round(-2.6886253964381557, 8)
# Test when we apply a Sell order. Sell higher than open rate @ 0.00001173
trade.update(market_leveraged_sell_order)
assert trade.calc_profit() == round(0.0001433793561218866, 8)
assert trade.calc_profit_ratio() == round(0.03802415223225211, 8)
# Test with a custom fee rate on the close trade
# assert trade.calc_profit(fee=0.003) == 0.00006163
# assert trade.calc_profit_ratio(fee=0.003) == 0.06147824
@pytest.mark.usefixtures("init_persistence")
def test_interest_kraken(market_leveraged_buy_order, ten_minutes_ago, five_hours_ago, fee):
"""
Market trade on Kraken at 3x and 8x leverage
Short trade
interest_rate: 0.05%, 0.25% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
stake_amount: 0.0037707443218227
borrowed: 0.0075414886436454
amount:
91.99181073 * leverage(3) = 275.97543219 crypto
91.99181073 * leverage(5) = 459.95905365 crypto
borrowed:
0.0075414886436454 base
0.0150829772872908 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
5 hours = 5/4
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1 = 3.7707443218227e-06 base
= 0.0075414886436454 * 0.00025 * 5/4 = 2.3567152011391876e-06 base
= 0.0150829772872908 * 0.0005 * 5/4 = 9.42686080455675e-06 base
= 0.0150829772872908 * 0.00025 * 1 = 3.7707443218227e-06 base
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.0037707443218227,
amount=91.99181073,
open_rate=0.00001099,
open_date=ten_minutes_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='kraken',
leverage=3.0,
interest_rate=0.0005
)
assert float(round(trade.calculate_interest(), 8)) == 3.7707443218227e-06
trade.open_date = five_hours_ago
assert float(round(trade.calculate_interest(interest_rate=0.00025), 8)
) == 2.3567152011391876e-06 # TODO: Fails with 0.08624233
trade = Trade(
pair='ETH/BTC',
stake_amount=0.0037707443218227,
amount=91.99181073,
open_rate=0.00001099,
open_date=five_hours_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='kraken',
is_short=True,
leverage=5.0,
interest_rate=0.0005
)
assert float(round(trade.calculate_interest(), 8)
) == 9.42686080455675e-06 # TODO: Fails with 0.28747445
trade.open_date = ten_minutes_ago
assert float(round(trade.calculate_interest(interest_rate=0.00025), 8)) == 3.7707443218227e-06
@pytest.mark.usefixtures("init_persistence")
def test_interest_binance(market_leveraged_buy_order, ten_minutes_ago, five_hours_ago, fee):
"""
Market trade on Kraken at 3x and 8x leverage
Short trade
interest_rate: 0.05%, 0.25% per 4 hrs
open_rate: 0.00004099 base
close_rate: 0.00004173 base
stake_amount: 0.0037707443218227
borrowed: 0.0075414886436454
amount:
91.99181073 * leverage(3) = 275.97543219 crypto
91.99181073 * leverage(5) = 459.95905365 crypto
borrowed:
0.0075414886436454 base
0.0150829772872908 base
time-periods: 10 minutes(rounds up to 1 time-period of 4hrs)
5 hours = 5/24
interest: borrowed * interest_rate * time-periods
= 0.0075414886436454 * 0.0005 * 1/24 = 1.571143467426125e-07 base
= 0.0075414886436454 * 0.00025 * 5/24 = 3.9278586685653125e-07 base
= 0.0150829772872908 * 0.0005 * 5/24 = 1.571143467426125e-06 base
= 0.0150829772872908 * 0.00025 * 1/24 = 1.571143467426125e-07 base
"""
trade = Trade(
pair='ETH/BTC',
stake_amount=0.001,
amount=275.97543219,
open_rate=0.00001099,
open_date=ten_minutes_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='binance',
is_short=True,
borrowed=275.97543219,
interest_rate=0.0005
)
assert float(round(trade.calculate_interest(), 8)) == 1.571143467426125e-07
trade.open_date = five_hours_ago
assert float(round(trade.calculate_interest(interest_rate=0.00025), 8)
) == 3.9278586685653125e-07
trade = Trade(
pair='ETH/BTC',
stake_amount=0.001,
amount=459.95905365,
open_rate=0.00001099,
open_date=five_hours_ago,
fee_open=fee.return_value,
fee_close=fee.return_value,
exchange='binance',
is_short=True,
borrowed=459.95905365,
interest_rate=0.0005
)
assert float(round(trade.calculate_interest(), 8)) == 1.571143467426125e-06
trade.open_date = ten_minutes_ago
assert float(round(trade.calculate_interest(interest_rate=0.00025), 8)) == 1.571143467426125e-07