Divide your quantities into 3 parts or two parts.
Put AMO of 15.43 / 15.44 / 15.45 in three seperate quantities.
Lets say you have 30 qty then Make three AMO of 10/10/10 quantities. Chance are high for your one of the order would get execute, if you are lucky there might be all order would execute.
GTT would not work in Circuits. They are for longer period(Max 1 year) and works during market hours.
GTT is a trigger that stays in broker system, I when trigger condition is met it sends order to exchange hence from that moment same priority as any other day order