IQ Option is a CFD broker that provides traders with the unique opportunity to trade pairs of competing assets, such as stocks, against each other. Traders receive a proprietary trading platform, which features tight spreads with commission-free trading from 0.1 pips and a maximum leverage of up to 1:500. I rate IQ Option as best for traders who specialize in highly liquid assets. Its swap-free accounts also make it ideal for overnight strategies. Check out this in-depth review to assess its trading conditions for yourself and see if IQ Option is the broker for you.