bet amount formula help please

Hi,

I would like to create a bet amount formula for the Back2 trigger given the following criteria.
1) Bet flat stake with zero bets matched. (First bet of the event)
2) Bet 10 if one bet is matched in market.
3) After several bets and greening takes place then repeat the process.
example:
Back1    Player A   5.00
Back2    Player B   10.00
Back3    Player B   11.00
Back2    Player A   12.00
Greenup     greened up
Back1    Player A   5.00
Back2    Player B   ??
Lets say the current formula for Back2 bet amount is:
IF(market_mbnum=1,10,bm_backa+1)

How do we add "if the Back2 trigger fires after the Back1 trigger place a bet of 10.00" ?
added info:  the Back1 bet amount will always be the same, in this example 5.00.
Back2 trigger like Back3 can fire several times at different amounts. But when Back2 fires after the Back1 trigger the amount will always be the same, in this case 10.00.

Thanks guys
R

bm_backa+1+back_matched

backed_matched will give you the total amount matched .. so can be used in back2, back3 etc.

bm_backa is also another option depending on what exactly you're trying to achieve.

Hi
A few ideas:

IF(bm_backa=5,10,bm_backa+1)

or set a user variable with the amount according to market conditions or number of runs

or have a trigger Back2a specifically for this:
amount: 10.00
condition:
and trigger Back1 number of runs is equal to 1

Thanks guys, I'll have a look at these and report back
Cheers
R

Hi 1oser & Mark,

I've opted for Mark's separate trigger approach. It seems a sensible option and works fine.
Thank you both for your generous help.
R