When ticked this will keep any unmatched bets in play.
This is similar to the standard Betfair feature on the website. It only works with In Play Horse racing markets or other In Play Events.
It will not place new bets in play, but only allow bets already placed before the off that are unmatched to go in play and try and get matched.
You could use it effectively with adjust bet ticks to put in offset bets that do not get matched, but then go in play to try and get matched. A sneaky trick
