How to see history trade microtransactions

If you want to see actual purchases, go to your account, and on the right there's an "Account Transactions" option.

If you're referring to microtransactions you've bought in the store with the points you've purchased, there currently isn't a transaction history you can view anywhere for that. You could try contacting support, maybe they have such records.
Personally I keep a record in a spreadsheet, and would recommend doing that.

there is no such thing as a microtransaction history and even ggg support can't provide it.

your mtx are just a wild collection of stuff you got for free, stuff you got thrown after you for just playing the game, stuff you won in races (haha), stuff that you got for a small fraction of the usual support from boxes and stuff that you got for a reduced price.

well, yes. some few guys also payed full price for their mtx for some weird reasons like keeping the company running.

is it really worth to have a list of from where your bling came from?