ICT IPDA Lookback

This description is tailored for the TradingView community, using the specific terminology associated with Michael Huddleston's (ICT) Interbank Price Delivery Algorithm (IPDA).

📜 TradingView Indicator Description
ICT IPDA Lookback Engine (20-40-60 Day Cycles)
Overview This indicator automates the IPDA Data Range lookback periods as taught by Michael J. Huddleston (ICT). In the Interbank Price Delivery Algorithm, time is the primary filter. The algorithm references specific lookback windows—20, 40, and 60 trading days—to seek liquidity and rebalance inefficiencies.

Instead of manually counting bars every morning, this tool plots precise vertical anchors to help you identify the Institutional Order Flow and the "Draw on Liquidity" (DOL) within the current dealing range.

🛠️ Key Features
Rolling Lookback Anchors: Automatically plots red vertical lines at the 20, 40, and 60-day intervals.

Time-Based Accuracy: Calculated using calendar-adjusted trading days to ensure the lines land on the correct institutional data points, regardless of weekends or holidays.

Multi-Asset Support: Works seamlessly across Forex, Futures, Indices, and Commodities.

Real-Time Movement: The lines shift dynamically with the current candle, maintaining the exact IPDA window as the algorithm processes new data.

💡 How to Use (ICT IPDA Logic)
Define the Context: Look back at the 20-day range (Short-term), 40-day range (Intermediate-term), and 60-day range (Long-term).

Identify PD Arrays: Use these vertical lines to anchor your search for Old Highs/Lows, Fair Value Gaps (FVG), and Order Blocks (OB) within those specific windows.

Determine Premium vs. Discount: Check where the current price sits relative to the Highs and Lows of these three ranges to establish your Daily Bias.

Quarterly Shifts: Monitor how price reacts as it reaches the extremity of the 60-day lookback, often signaling a potential "Quarterly Shift" in institutional direction.

📖 Technical Details
Indicator Type: Overlay

Calculations: Uses timenow and millisecond conversion for precise "Calendar Day" placement.

Best Timeframes: Designed for the Daily (1D) chart but can be used on lower timeframes (H4, H1, M15) to visualize the higher-timeframe data ranges while scalping.