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fix(docs/strategy-advanced): add warnings

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Joe Schr 2021-03-04 18:50:48 +01:00
parent a6ef354a5f
commit c56b9cd751
1 changed files with 15 additions and 1 deletions
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docs/strategy-advanced.md
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@ -60,6 +60,12 @@ class AwesomeStrategy(IStrategy):
return dataframe return dataframe
``` ```
!!! Warning
The data is not persisted after a bot-restart (or config-reload). Also, the amount of data should be kept smallish (no DataFrames and such), otherwise the bot will start to consume a lot of memory and eventually run out of memory and crash.
!!! Note
If the data is pair-specific, make sure to use pair as one of the keys in the dictionary.
See `custom_stoploss` examples below on how to access the saved dataframe columns See `custom_stoploss` examples below on how to access the saved dataframe columns
## Custom stoploss ## Custom stoploss
@ -236,6 +242,11 @@ Imagine you want to use `custom_stoploss()` to use a trailing indicator like e.g
See: "Storing custom information using DatetimeIndex from `dataframe`" example above) on how to store the indicator into `custom_info` See: "Storing custom information using DatetimeIndex from `dataframe`" example above) on how to store the indicator into `custom_info`
!!! Warning
only use .iat[-1] in live mode, not in backtesting/hyperopt
otherwise you will look into the future
see: https://www.freqtrade.io/en/latest/strategy-customization/#common-mistakes-when-developing-strategies
``` python ``` python
from freqtrade.persistence import Trade from freqtrade.persistence import Trade
from freqtrade.state import RunMode from freqtrade.state import RunMode
@ -260,7 +271,10 @@ class AwesomeStrategy(IStrategy):
# but we can just use the last entry from an already analyzed dataframe instead # but we can just use the last entry from an already analyzed dataframe instead
dataframe, last_updated = self.dp.get_analyzed_dataframe(pair=pair, dataframe, last_updated = self.dp.get_analyzed_dataframe(pair=pair,
timeframe=self.timeframe) timeframe=self.timeframe)
# but we can just use the last entry to get the current value # WARNING
# only use .iat[-1] in live mode, not in backtesting/hyperopt
# otherwise you will look into the future
# see: https://www.freqtrade.io/en/latest/strategy-customization/#common-mistakes-when-developing-strategies
relative_sl = dataframe['atr'].iat[-1] relative_sl = dataframe['atr'].iat[-1]
if (relative_sl is not None): if (relative_sl is not None):