Settings between backtest / live

[Guysmo]

But if we change parameter's value, that's mean the backtest result is wrong compared to our current strategy ?

Old backtests yes, but you can run a new one (with your new parameters) in a second. I've just added some docs to the backtesting documentation that might be of interest. See here: https://gekko.wizb.it/docs/features/backtesting.html

Thanks for the article.
If I understand we can't keep in mind our backtest result will be always good. So I guess the best way is to try on paper trade while adjusting parameters on the fly with bull / bear / sideways market ?