This script is an utility tool for manual backtesting.
The main problem in backtesting a discretionary strategy is the bias of knowing the future result of the market, in this way all the market will be crushed into a flat line, this way you can avoid bias.
The way to use this indicator is easy and made by 4 step:
Step 1 : add to an asset you won't backtest and...
Changes the colors of candles within your selected trading zone -> good for reminding that you are out of trading window anymore. Can work as session indicator. This is the first version so be nice :)