Support Board

I wanted to basically understand whether the price on the chart changes immediately tick by tick, or is it refreshed after certain time. In TOS, I can see the price move in the charts after every second or so.

I want to do this to trade pairs like SPY -QQQ. While there is an ability to stop price the pair, I do not get the price which TOS chart shows, because the price has moved. I was wondering if with sierra chart I get almost realtime price, which moves continuously then I can pair trade better.

I want to do short term frequent pair trades. That is why continuously changing price is important to me.