As per technical analysis , 234 was a breakout and it was covering perfect trendling to give a expected breakout. you can use the fibonacci retracement for this type of chart to get the levels. Breakout also have some resistance in above level which can also be trace from fibonacci. Fibonacci is math term which is a series of number created by doing same action...
SBI countinue falls and hit the ground to bounce back and using a uptrend by taking support on fibonacci levels as well as by giving respect to trend range. If SBI crosses/sustain the half retracement, It will definety take a Long Position and touches the sky of @425