Below is a valid but failed order block,
valid because it has broken previous low. and failed because price didn’t respect it and broke its high again.

Order block becomes breaker block if price comes back to test it

Absorption Candle

price hitting supply again and again and a breakout happens with low volume as compared to all the volumes of supply area candles.

CAB trade missed but absorption candle gave the trade
sl below conform high low

confirm low doesnt break after absorption candle
