Hi Ashish...I've been tracking Gateway since it was 220 and had called it along with Unichem Labs and Bharat Forge a little before the market had tanked.
At this juncture Gateway is into a primary uptrend, as I see it, following good consoliation since August. It's looking very strong indeed and a certain hold for now, though I would hesitate taking fresh positions at these levels as technically it's way overbought. It's difficult to say when it'll correct and where it's heading. It's clearly a crowd favourite and can go higher...and probably will, tough some correction should come sometime soon.
It's not going to be easy setting a technical stop loss either, as any dip is going to bring in more buyers...perhaps till 255 holds.
Just hold for now, though you've come in quite high. Should it dip to 255 or even 267, it's most likely to bounce back again. I've position in this and tracking it too.
Good luck.
PS your chart reading is pending...will come to it soon...sorry for the delay.