Well look at the chart & see that it's pretty clear that at around 248 the RSI indicator almost touched 30 but then at 259 the rsi went down till 26. So a clear indication that people are bullish about this. we can buy at around 270 for a Rs. 40/- target to Rs. 310/-.
At 1119 the RSI was at 83-84 & now at 1276 the RSI is around 75 shows a clear sign of overvaluation & also steeper the climb faster is the downfall. Short @ 1280-1300 & for a T1 of 1080 & T2 of 850.
The Flag pattern as seen is generally considered to be a continuation trend. So a Buy will only be triggered post breakout of the trendline.