How user-friendly is their platform? – The trading platform provided by the broker needs to work for you. Most brokers offer several to choose from, some will tick the boxes for the average day trader, others will offer more advanced platforms for the veteran trader. Likewise, does it suit your hardware – is the platform compatible on Mac, PC, Linux, or whatever you use?
Control greed – Greed often influences traders in the following way; you enter a trade at $80 with a target of $95, but then it hits $95 and you think ‘I’ll just hold on a bit longer and increase profits further’. This only ends with you eventually losing big. The solution; stick rigidly to your strategy. Think long term and don’t deviate from your strategy, there’s simply no need to gamble.