There are 2 force types in ATL, a normal force and a fast force.
When out.cgi is loaded, there is a chance that a force-trade is loaded before the primary trades are loaded from the outgoing list. The fast forces have a higher chance to be selected than a normal force. If you find that normal forces are not filled enough, switch a couple of trades to a fast force. Try to keep the total size of your forces under 30% of your total outgoing traffic to trades.