I'm trading big money, so I prefer regulated brokerage with clear conditions. Today there's a lot of unreliable companies and I even don't mean that they want to scam you. I just mean ther such companies may be good for brokers with small deposit, but if you're looking to trade big money - you should take care about security. Why I've choose this broker? That's combination of two factors - FCA regulation and good trading conditions. That's simple. I just need reasonable spreads and good clients' support combined with high reliability. There I get both of this sides, so I just trade.