Huge brokers are just easier to trade with. Its a fact. They have way more liquidity, and therefore they have a lot less slippage and no requotes. The bigger the broker, the better the tools it can provide for its traders. Like with XM, the amount of tools they give for FREE is a bit crazy. Including even special indicators, automation tools, lots of specific technical and trade ideas every day. No smaller broker could do that, they wouldn't have the team or the money.
Feel quite comfortable trading here, with such a giant protecting my back.