Hey Guardian .

Hope you are well.

It does not really matter which market you use.

However you can calculate the pivots for each market depending on the time they open and close. you can trade those levels where you have confluence. Meaning where 2 or more pivot levels overlap. These levels have a higher probability of acting as a good support or resistance point. Confirm with your technicals too though.

I use the London market mainly if I am trading the 5 minutes chart as most of the time, this market experiences high volume trading
Here is what i do : (i use the close and open of the UK market)
-Use the open, high, low and close of the UK session.

Once you get those right calculate the pivots.

Time may vary depending on your broker of choice, If you are having difficulties getting the time right, you may always contact your broker and ask them the time difference between their brokerage time and the time in GMT. That may help get the close and open of each market right.

Best of luck

Ash Naeck