When setting up the trade, in the area marked "Instant Force" type in a number there, that will force the number you specify to be sent to that URL, I'm assuming this is because you need to force X amount of hits to a site for their trade to work with you?
Unless you're meaning that the site gets priority among others, in which case, higher the % in "Ratio" section, give it 150% instead of 100% and it will take priority against other trades as well.
