I have tried that strategy before but I found it really drab to me. It entails time and energy for you to look at the price, figure out the prefect time to buy and then you need to find an appropriate time to sell.
If you yearn for just several dollars, you can sell in a few hours or even minutes, but it turns out to be not worth your energy, "Do I really need to spend this energy on the few dollars?"
If you hanker for a considerable amount of money, either you invest a lot or you wait for some time, maybe a few weeks or even years. That is risky coz if you invest a lot, it's probably you lose a lot. though the price seems low now, it might slump in the next second; if you need to wait for a long time, then the price is more unpredictable!
always taking profit sounds like a good idea, but I really don't recommend it