I am testing AmiBroker and NinjaTrader using IB real time data. The timestamp for the realtime and back filled data is based on PC clock. I live in a time zone which is gmt+8. So now the data is showing datetime as 14/June Sat morning. I am not sure if this is an issue as people in US will face same 'problem' as there are different time zones in US as well. This will happen also for those in US who trade instruments in both US exchanges and let say Hong Kong exchanges. Are the other data feed such as DTN IQ, Open Tick etc have the timestamp based on PC clock as well? Shouldn't the timestamp reflect the timestamp of the exchange? I am thinking of adjusting the time clock of my PC to US time zone. But then which US time zone must I set? Are all US exchanges in one time zone? Is it the correct way to do?