ICT IPDA Lookback / Cast-forward

This script automatically displays 20/40/60 daily range highs and lows.
Known as IPDA ranges, a term popularised by Inner Circle Trader (ICT). IPDA = Interbank Price Delivery Algorithm.

You can also add 80 day lines (my own addition) . IPDA labels are shown for Daily highs, and an equivalent line is drawn at IPDA Daily lows - but without the label to keep your chart as clean as possible. You can use this on hourly timeframes as well.

ICT is "flexible" on IPDA data ranges in his mentorship regarding whether you should use the first day of each month, or go recalculate day by day, and that's why this script lets you do both + also has an option to set a hard specified date - useful for more advanced purposes.

You can also Cast-forward the displayed 20/40/60 (+80) IPDA ranges with this tool.

You can use IPDA ranges to forecast Highs and Lows that price will be attracted to on a Daily timeframe and where price is in its P/D range, being in a discount or premium. You can also use this knowledge to help guide lower timeframe scalps.

Longer term traders can reference the 40 and 60 Day Look Back lines for an indication of current market conditions.