First of all, am not a big fan of trading contest because you will act and be taking trades you shouldn't have because you are desperate, ...
Contest only leads to rash decisions and poorly entered positions. You can make good money from long term trading but if you are going for these contests, they lead to the complete reversal of the buy-low-sell-high system.
It is because exchanges love people who make rash decisions and lose money. Trading fee is also another factor that brings them money.
It is best to avoid them as much as possible rather never participate in them. Be the long term trader with goals for stable profits.