New Posts For Thread: calculatorshttps://community.betfair.com/general_betting/go/thread/view/94082/23469254/calculatorshi does anyone know and good calculators that can be used as part of a martingale system. i would like one that can be used for lay betting as well as backinghi does anyone know and good calculators that can be used as part of a martingale system. i would like one that can be used for lay betting as well as backinghttps://community.betfair.com/general_betting/go/thread/view/94082/23469254/calculators?post_id=419149578#419149578hi does anyone know and good calculators that can be used as part of a martingale system. i would like one that can be used for lay betting as well as backingMon, 23 Nov 2009 13:49:11 -0600