This is a you problem, not a "strategy" problem.  The reason you mess up your strategy is because you let your emotions get the better of you and you think you can game the system. Then you start trying to outsmart the market, and we all know how that turned out. This isnt "harder than it looks," it's as hard as you make it by trying to be clever.  Just go to a major exchange that has a "recurring buy" or "dollar-cost averaging" option. You tell them how much, when (weekly, monthly, etc.), and you link your bank account, thats it. You are done. You never have to think about it ever again.