Forex trading vs Futures trading

I will not explain what is better to trade Forex or futures. I will not explain you that a lot of FOREX brokers trade against you. I just show you a pictures where we compare DOM of GBPUSD and 6b (future on GBPUSD).

As you can see there are about 10-15 pips in average between bid and ask on FOREX market and no spread on futures market. Every time when you opened or closed position by market you will pay extra money for spread. This is not mean that on futures market no spread. It is exist. But only during fast movement and not more then several pips. 

Each overpayment for spread could kill your the best intraday strategies. To win in this game (intraday trading) you need have advantages more than 2 till 1. It's mean that you have to do 2/3 your trades without loss. This is to hard.

So in this way if you want to win you have to use better instruments like futures or bigger time frame  from 1 hour and higher.