Will my chart stay up to date?

Yes, chart data is polled every 4 seconds from the Time and Sales api resource.

Things to note:

a) The main application poller requests snapshot data as fast as possible and the chart may not match that data second to second. For an accurate, up to the second representation of the market, always reference the market sheets or ladder.

b) If you are not paying for live data, your chart will be populated with 10 minute delayed historic data and will update with 10 minute delayed Time and Sales data. In this case, the chart will be clearly labeled with "Delayed data" text.