Good professionals make significant money (depending on account size and risk practices) like this.
If you do the math, figure about 180 days of work (200 minus August), you can see what the potential is..
A skilled person trading a decent sized account with strategies that have a positive expectancy is limited by the liquidity of the markets, ability to execute and logistics (ability to keep connected, IT management, etc).
At this level, skilled professionals generally have support staff to help them. This means they don't miss many opportunities and if the staff is good, losses are held within acceptable limits.
I would say that it would be highly unlikely for a retail trader.
So in summary, yeah, good professionals can do this and more.