From 1792e0fb9b0576fb7e0480c373b776128be3ddc0 Mon Sep 17 00:00:00 2001
From: Janne Sinivirta <janne.sinivirta@gmail.com>
Date: Thu, 19 Oct 2017 17:12:49 +0300
Subject: [PATCH] use hyperopt to find optimal parameter values for indicators

---
 freqtrade/tests/test_hyperopt.py | 124 +++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 freqtrade/tests/test_hyperopt.py

diff --git a/freqtrade/tests/test_hyperopt.py b/freqtrade/tests/test_hyperopt.py
new file mode 100644
index 000000000..72704647f
--- /dev/null
+++ b/freqtrade/tests/test_hyperopt.py
@@ -0,0 +1,124 @@
+# pragma pylint: disable=missing-docstring
+import json
+import logging
+import os
+from functools import reduce
+
+import pytest
+import arrow
+from pandas import DataFrame
+
+import hyperopt.pyll.stochastic
+
+from hyperopt import fmin, tpe, hp
+
+from freqtrade.analyze import analyze_ticker
+from freqtrade.main import should_sell
+from freqtrade.persistence import Trade
+
+logging.disable(logging.DEBUG) # disable debug logs that slow backtesting a lot
+
+def print_results(results):
+    print('Made {} buys. Average profit {:.2f}%. Total profit was {:.3f}. Average duration {:.1f} mins.'.format(
+        len(results.index),
+        results.profit.mean() * 100.0,
+        results.profit.sum(),
+        results.duration.mean() * 5
+    ))
+
+@pytest.fixture
+def pairs():
+    return ['btc-neo', 'btc-eth', 'btc-omg', 'btc-edg', 'btc-pay',
+            'btc-pivx', 'btc-qtum', 'btc-mtl', 'btc-etc', 'btc-ltc']
+
+@pytest.fixture
+def conf():
+    return {
+        "minimal_roi": {
+            "50":  0.0,
+            "40":  0.01,
+            "30":  0.02,
+            "0":  0.045
+        },
+        "stoploss": -0.40
+    }
+
+
+def backtest(conf, pairs, mocker, buy_strategy):
+    trades = []
+    mocker.patch.dict('freqtrade.main._CONF', conf)
+    for pair in pairs:
+        with open('freqtrade/tests/testdata/'+pair+'.json') as data_file:
+            data = json.load(data_file)
+
+            mocker.patch('freqtrade.analyze.get_ticker_history', return_value=data)
+            mocker.patch('arrow.utcnow', return_value=arrow.get('2017-08-20T14:50:00'))
+            mocker.patch('freqtrade.analyze.populate_buy_trend', side_effect=buy_strategy)
+            ticker = analyze_ticker(pair)
+            # for each buy point
+            for index, row in ticker[ticker.buy == 1].iterrows():
+                trade = Trade(
+                    open_rate=row['close'],
+                    open_date=arrow.get(row['date']).datetime,
+                    amount=1,
+                )
+                # calculate win/lose forwards from buy point
+                for index2, row2 in ticker[index:].iterrows():
+                    if should_sell(trade, row2['close'], arrow.get(row2['date']).datetime):
+                        current_profit = (row2['close'] - trade.open_rate) / trade.open_rate
+
+                        trades.append((pair, current_profit, index2 - index))
+                        break
+
+    labels = ['currency', 'profit', 'duration']
+    results = DataFrame.from_records(trades, columns=labels)
+
+    print_results(results)
+    if len(results.index) < 800: 
+        return 0
+    return results.profit.sum() / results.duration.mean()
+
+def buy_strategy_generator(params):
+    print(params)
+    def populate_buy_trend(dataframe: DataFrame) -> DataFrame:
+        conditions = []
+        conditions.append(dataframe['close'] < dataframe['sma'])
+        conditions.append(dataframe['tema'] <= dataframe['blower'])
+        if params['mfi']['enabled']:
+            conditions.append(dataframe['mfi'] < params['mfi']['value'])
+        if params['fastd']['enabled']:
+            conditions.append(dataframe['fastd'] < params['fastd']['value'])
+        if params['adx']['enabled']:
+            conditions.append(dataframe['adx'] > params['adx']['value'])
+
+        dataframe.loc[
+            reduce(lambda x, y: x & y, conditions),
+            'buy'] = 1
+        dataframe.loc[dataframe['buy'] == 1, 'buy_price'] = dataframe['close']
+
+        return dataframe
+    return populate_buy_trend
+
+@pytest.mark.skipif(not os.environ.get('BACKTEST', False), reason="BACKTEST not set")
+def test_hyperopt(conf, pairs, mocker):
+
+    def optimizer(params):
+        return backtest(conf, pairs, mocker, buy_strategy_generator(params))
+
+    space = {
+        'mfi': hp.choice('mfi', [
+            {'enabled': False},
+            {'enabled': True, 'value': hp.uniform('mfi-value', 10, 50)}
+        ]),
+        'fastd': hp.choice('fastd', [
+            {'enabled': False},
+            {'enabled': True, 'value': hp.uniform('fastd-value', 10, 50)}
+        ]),
+        'adx': hp.choice('adx', [
+            {'enabled': False},
+            {'enabled': True, 'value': hp.uniform('adx-value', 10, 50)}
+        ]),
+    }
+
+    # print(hyperopt.pyll.stochastic.sample(space))
+    print(fmin(fn=optimizer, space=space, algo=tpe.suggest, max_evals=2))