Back different amounts based on price

Hi,
I would like to know if there is an existing trigger or a link / help with the following please.
Back different amounts from a percentage of bank and on the price of the selection.
Similar to the Maria Lay Staking but for backing, I tried to modify to backing but without success.
example:
After importing my selections, I would like to back:
3% of bank on the selections between 1.7 and 2.29
2% between 2.30 and 3.0
1.5% between 3.10 and 7.00
1% between 7.01 and 10.0
0.5% over 10

Thanks

Hi
Try this trigger. Add your conditions for import etc. Set price ranges and bank percentages in the constants.
Please test in test mode.

Great, will try that out
Thank you