Dislikednot entirely accurate but just to give you an idea.
http://www.forexstreet.net/photo/liquidity-in-fx
divide that 4,340,275 into 20-30 most commonly available pairs across all the trading platforms and it gets really scary.
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DislikedThe full answer isn't short enough for a thread here, but you can get an idea from the attached document.Ignored
thanks guys for the share