"Buy low, sell high", is not a strategy.
Scoring more points than the other team is not a strategy. Hitting sub par golf is not a strategy. "Buy low, sell high" is not a strategy. It's a worthless platitude, one you should consider dropping.
I'm quite sure you don't say that to anyone other than denizens of the internet. You seem to use it as a pointy little object to poke at strangers from the comfort of your couch when your position has been undermined.
Really. If you were a successful trader who could capitalize on the markets by repeatedly regurgitating a platitude, odds are you wouldn't be trying to impress anonymous characters on an obscure stock forum.