Firstly lets assume that BA downloads to cell A1 in EXCEL.
Scenario - I place a bet, say BACK of £100 at Odds of 2.00 against selection 1.
Cell N5 will show BACK.
Cell O5 will show 2.00.
Cell P5 will show £100.
This will trigger the bet to Betfair. Yes?
Then ........
N5, O5 & P5 remain as above.
Q5 will show PENDING
(Assume it is at this stage that you would change Cell N5 to something else, say WAIT)
Q5 will then show a 10 digit numeric Bet Ref No when the bet is MATCHED.
R5 will show the Time of the Bet.
S5 will show the Average Odds at which you were MATCHED.
T5 will show £100 .... if fully MATCHED.
U5 will show 'possible' profit i.e. £200.
IF the bet is partially MATCHED what will the above cells show? Where & how is the UNMATCHED portion shown?
If the bet is fully MATCHED, but in 2 stages, what does Q5 show? Assume the 2nd Bet Ref No!!?
If the Bet is not MATCHED will CANCEL in cell N5 do the same as clicking on the 'x' in Betfair? If not, how IS the bet cancelled? Does CLEAR do the job?
If the Bet is fully MATCHED then I would use CLEAR in cell N5, which would clear all entries N5:U5, ready for next bet. Yes??
I've made-up an EXCEL based 'Ladder Trading' system (same format as Adam Todds software), but just need to get my head around what happens in these cells & in what sequence, so that I can get them populated using either formulae or VB.
Once I know what appears in what cell & in what order, covering the different scenarios (i.e. Fully Matched, Partially Matched, UnMatched) I think I'll make myself a 'flow-chart' first, then program/write formula based on that, otherwise I can see myself getting in a mess

I don't have access to a computer over the next week or so

Next step will be to set-up a Stop-Loss of say, 3 ticks, so that I can automatically trade-out of a position i.e. BACK Bet £100 at 2.40, automatically set LAY Stop-Loss to 2.44, then if Bet goes in right direction (Shortens) and touch's LAY of 2.38 then I take the 1 tick profit, else the small loss. Thinking of making this a sliding feature .... if it touch's 2.38 ammend LAY bet to 2.36, if it touch's 2.36 ammend LAY bet to 2.34 etc. etc. then as soon as it goes back the other way take the trade, maximising the profit. Anyone been able to do this yet or has any views/suggestions on this??