How are they going to click buy and sell if they are not going to look at the pair in the exchange?

The price action on the exchange is an indicator itself.  But if they are just going to call someone to execute the trade just like the stock market way before there were platforms to operate on the computers, the wall observer will do.  It would be fun like the wolves of the wallstreet movie but its going to be worse if the fudsters come to post.