Okay so im a total newbie, i did my research did some demo for 4 months straight but i didnt know what i was doing.
someone suggested i should build a strategy, how do one go about building one?
What do you mean by "building one?"
If you mean devising rules that you intend to manually trade, there are gobs of them available on the Interwebs. For example, Babypips offers this one:
If you mean create an algorithmic system (robot, or EA) to trade automatically, look in the Code Base for examples.