Your analysis of W pattern is convincing but 30 Min. seems too short of a time frame to use in such a choppy market. on daily time frame, the low of 01-02-2021 (The Budget Day) has been respected and today nifty closed above 01-02-2021 high. signalling some strength. One more plus point here is that nifty closed above SMA100 of 14361, but clear uptrend will be confirmed once nifty closes above 14650 (high of recent three candles) or SMA20 of 14613 with handsome volumes. tomorrow's (23.04.2021) close will be crucial to sustain this momentum.