HDFC Bank is at the tail end of D wave completion and could take support any time. And price is also at near next line breakout after inverted head and shoulder pattern. I do not see much downside further unless any major reason for more sell off. At key levels big players made vice decision to buy back or buy reliance at key support levels. so similar support and spikes can be expected in HDFC Bank any time since this is also FIIs and DIIs favorite.