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Can I see pre-market and after-hours trading for US stocks?

Yes. In the chart's settings, set Session to Extended to include pre-market and after-hours trading, or Regular for the regular session only.

Yes. US stock charts can show the extended session. Open the chart's settings (right-click the chart and choose Settings…, or click the gear on the symbol legend), select Main, and set Session:

  • Extended includes pre-market and after-hours trading.
  • Regular keeps only the regular session.

Right-click the time axis and turn on Extended hours shading to tint the hours outside the regular session. The price axis can also show the pre-market and post-market price: right-click it, then Labels.

CME futures use their own names for the same idea: RTH (regular trading hours) and ETH (the full electronic session). RTH needs an intraday interval; daily and higher charts always show the full session.