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Add USDT to the list of fiat currencies

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USDT is common many exchanges and treated as a currency. 
It is helpful to allow USDT to be accepted as a fiat current when testing config.json
 
By way of example of a usecase
A strategy or otherwise report may not query:  config['stake_currency'] and currency = config['fiat_display_currency']
as the config.json with fail test, so cannot build  a base/pair such as BTC/USDT that is valid will not be built cleanly. 

Pulling BTC/USDT from config values can be useful to download query ticker file name and data, enumerating base/pair price to whitelist target pairs, performing correlation coefficient statistics etc.

As example: building a dataframe such as here 
           date       BTC/USDT      ETH/BTC          XLM/BTC        LTC/BTC
0    1517443200       10283.00       0.109475       0.000052       0.016031

The transposing to actual USDT ticker value row-wise per pair
               date  BTC/USDT   ETH/USD   XLM/USD     LTC/USD
1517443200  10283.00   1125.731425  0.535950  164.846773
This commit is contained in:
creslin 2018-05-30 10:42:51 +03:00 committed by GitHub
parent 280e8b3208
commit 2600e189bd
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1 changed files with 2 additions and 1 deletions
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3
freqtrade/constants.py
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@ -40,7 +40,8 @@ CONF_SCHEMA = {
'KRW', 'MXN', 'MYR', 'NOK',
'NZD', 'PHP', 'PKR', 'PLN',
'RUB', 'SEK', 'SGD', 'THB',
'TRY', 'TWD', 'ZAR', 'USD']},
'TRY', 'TWD', 'ZAR', 'USD',
'USDT']},
'dry_run': {'type': 'boolean'},
'minimal_roi': {
'type': 'object',