Standard candlestick charts show where price has been; order flow footprint charts reveal how the price got there by dissecting bid-ask execution volume tick by tick.
1. Spotting Institutional Iceberg Absorption
When market buyers attack resistance with aggressive market orders, you will see high green volume in the footprint (e.g. 500 contracts). If the candle closes lower with a heavy upper wick, it confirms that a passive limit order (iceberg) absorbed all buying volume, setting up a high-win-rate short reversal.