I have been researching how to cancel all unmatched bets and know that the CANCEL-ALL-MARKET command is the one I need. The question is where does this need to be inserted in the Place Bets sheet?
Is it column Q of the market sheet or column D of the selections sheet? I know the bet ref column needs to contain something.
In the trigger column Q against any selection so long as you have something in the Bet Ref column.
Please note you need to be using the Beta version to use this trigger.