"If you wish to use a Lay staking plan , this plan works well on a solid SR

1-4 Lay Staking Plan
Where the bet is increased by 1 unit after each loss & is held at that bet until
losses are recovered.

Max Bet is 4 units & hold it at that level until losses are recovered."
Bhagwan (thanks)
Now see if I understand
My bets are determined by a formiula I use, dependant on the horses's
price.
bets are: all units ()= loss
(27) 16 21 16 20 22 25 20 16 (62) 25 20 (44) (60) 20 20 20 16 25 40
Total lost = 193 Total won = 342 Profit = 143
If I use your staking plan then:
(27) add1unit next bet 32 loss recovered
next bets back to one unit 21 16 20 25 20 16 (62)
add one unit next bet 50 and next bet 40 loss recovered
next bets back to one unit (44)add 1 unit next bet (120)
add 2 units next bets 60 60 60 loss recovered
next bets back to one unit 16 25 40
Total lost = 253 Total won 513 Profit = 268
Looks plausible, however would not want to
hit more than 2 lossess in a row as above
stakes could get out of hand

Thankyou Bhagwan, points noted.
I've probably ended up with too much chaff
whilst sorting through the hay.
Time to go and see if I can find the trees
in the woods.