AUD/CAD buy 15m

We have had a bullish push which has broken 1hr and 15m structure, So far price has been corrective so this is a continuation of bullish order flow. We have a failed supply zone so looking back we want to know what caused the failure whci was the wick of the 15m candle which on a LTF can clearly see a 3m OB with Imbalance above it. We have trend line liquidity both side of price.