Candle adjustment with market timings

I am from India, hence in India market timings are for 6:15 hours that is from 9:15 to 15:30, I need help plotting 75,125 min charts,
The problem with this time frame chart occurs in last minutes, it shows cutting candles of last 15 min, I want to merge that candle into previous candle. Please help, I tried [Align minute bars to regular market ] option in intraday tab in preferences its not the solution I want.

Please help