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update documentation about download_backtesting_data.py script

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Janne Sinivirta 2018-06-04 12:30:21 +03:00
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docs/backtesting.md
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@ -93,22 +93,30 @@ The full timerange specification:
`--timerange=1527595200-1527618600`
**Update testdata directory**
To update your testdata directory, or download into another testdata directory:
```bash
mkdir -p user_data/data/testdata-20180113
cp freqtrade/tests/testdata/pairs.json user_data/data/testdata-20180113
cd user_data/data/testdata-20180113
```
**Downloading new set of ticker data**
To download new set of backtesting ticker data, you can use a download script.
Possibly edit `pairs.json` file to include/exclude pairs
If you are using Binance for example:
- create a folder `user_data/data/binance` and copy `pairs.json` in that folder.
- update the `pairs.json` to contain the currency pairs you are interested in.
```bash
python3 freqtrade/tests/testdata/download_backtest_data.py -p pairs.json
mkdir -p user_data/data/binance
cp freqtrade/tests/testdata/pairs.json user_data/data/binance
```
The script will read your `pairs.json` file, and download ticker data
into the current working directory.
Then run:
```bash
python scripts/download_backtest_data --exchange binance
```
This will download ticker data for all the currency pairs you defined in `pairs.json`.
- To use a different folder than the exchange specific default, use `--export user_data/data/some_directory`.
- To change the exchange used to download the tickers, use `--exchange`. Default is `bittrex`.
- To use `pairs.json` from some other folder, use `--pairs-file some_other_dir/pairs.json`.
- To download ticker data for only 10 days, use `--days 10`.
For help about backtesting usage, please refer to