Banknifty is making a wide bull spread like most of the bank chart. It grasped three days selling in a day.seems like highly bullish but it smells like something bigger is coming , market may reverse soon. Banks seems have fuel for 15-20 % upmove before they make reverse so banknifty. Notice banks bob , idfc, canara most of are making same candles with volume. So play with small bet. Just my observation(i may be wrong or right )