It really depends on how much money you invest, and how long it takes to have the $200. If you only used $4000, and wait only a short period of time to have $200 profit (5%), it is a good return. But if you use a lot of money to get that $200 return, it is just a waste of effort.
If you want to play like this, make sure your investing money is spare money. So even when the share keeps on dropping, you won't be forced to sell your share by necessity. And also make sure that the company that you invest on is good solid company, not something like no. 8 with no hope of return.
Good luck and have fun.