As for links, almost all the reputable centralized exchanges have trading competitions on their platforms from time to time. You can check the top ones by trust rating. However, I don't think it's worth it chasing competitions on exchanges. It's stressful for me following up on the dos and don'ts of these competitions. That's why I don't bother with them. Trading alone is stressful, let alone making someone constantly look over their shoulders to keep certain rules and regulations. This is why I'm never going to be a fan of pro firm accounts. I rather build capital by myself and trade at my own dictates.