I had placed a SL-M BUY order (tradingsymbol: "LSIL", instrument_token: 4557057) at 12:06:01pm at a trigger price of Rs 21. The order got executed at 12:06:11pm at an average price of Rs 21.25. However this price is outside the OHLC range of 12:06pm candle (Open: 19.75, High: 20.40, Low: 19.75, Close: 20.10). How is this possible?