At what point did you make your own stratagy?

Might be a weird question to ask but I've been reading and watching others strategies for a while now online and applying them to charts and marking where my fictional buy would be and then where my fictional sell would be in real time to try out different methods Found a few that seem pretty reliable but wondering when it would make sense to make it your own or make your own yourself I assume quite a few people here have done this so just interested at what point you decided actually I'm adding X Y Z or doing A B C differently as that works for you