I’m assuming that the second command is giving me a NaN because of the [ ] brackets.
After some hours of trying I’ve come to the point I must request for some help how to resolve this.
The [] brackets means that the data is stored in an array, you get a NaN error because you’re trying to exploit data of an array without accessing one of its item first, the fix simply consists of specifying which item of the array you want to read the content from: a[0].trade_price