Seems corrective a is finished as nifty taking support of 2 trendline confluence, 1 black long term trendline we find every time it worked as support n resistance(marked with rectangular box) nifty broke up on 1st aug consolidated n moved up to complete major wave 3, then corrected Till previous wave 4 (around 17150) which was inbuilt in wave 3 denoted as abcde(orange), n then moved up n finished wave 5 with divergence in rsi , then comes corrective waves ABC, generally corrective wave ABC ends near wave 4 so 17150 level becomes very important for nifty as subwave C_D (under wave 3) took support , then main wave 4 took support n as per Elliot wave corrective wave c would take support near wave 4 again 17150 level.by that time it might take support of ema200 on daily as currently ema 200 is around 16800 level.