The wind power major was trading within a slim range, except for the last hour of trade where it touched the weekly high of Rs 53 up by 14% of previous close. The share price at the end of the session settled at Rs 51, up 10%. Index heavyweight RIL s ended with a marginal gain of 0.1% at Rs 937. The sensex ended flat, up 0.2% or 32 points at 18,238. It touched an intra-day high of 18,356 and an intra-day low of 18,215. The nifty was up 14 points.