Bet Angel - Excel spreed sheet , automation - repost

I am in Australia and i like to lay places in Australian racing on betfair and want to do it in uk races but its late at night for me. What i want to do is just choose say 4 horses one after another and lay them all up bringing forward the liablity one after the other , until one of the horses dont place, sort of martingale system , I'm sure this is easy to do in bet angel ? It has to bring forward the previous liability aswell. and keeps going until a horse doesn't place i.e i win because i doubled up all previous lays. Personal assistance in explaining how i use it aswell