I’d like to know how the order of execution of any given script works. For example, There is a buying order for GMR Infra at 13.5. Even I’ve placed the order at 13.5. sometime though day’s low is same as my buy price, which is 13.5 in this case. order will not be execute. May be because many buying order at 13.5. so exchange will execute order First In First Out basis?