Hi Gonzalo,
I apologise for the time it took to respond to your request.
I made some changes to your trigger file. You can remember the prices of other markets of the same football match in the same way as you did with your first trigger. Now, if you take a look at the file, you will find two more similar triggers called "over/under 1.5" and "over/under 0.5". They will remember the corresponding selections under the name of rem_cuot2_market_parent_id and rem_cuot3_market_parent_id respectively. You can then use these variables just like you did with rem_cuot1_.
I have attached the market_parent_id suffix to the variable name in order to let the triggers run on different matches independently.