Hi,Karthik the ATP price has been calculated for intraday and only to estimate the speed of trades done which side.That means more trades as well as more volumes traded at the same or just near to ATP then the difference on that side change in ATP is little but at the same time if the low volumes traded at LTP so far from the ATP,caused more change in ATP,comparatively with previous.The ATP used to only estimate the Impact cost effect of order book dominated by real trades.Goodluck.