Full Size Button

When using the full-size button…

…the chart window expands to use the entire screen, but it does not show more bars. If there were originally 20 bars in the small chart window, after going full-screen there would still only be 20 bars, just a lot bigger, filling up the space.

My suggestion: When expanding a small chart window to fill the entire screen, keep the bar size the same, but add more bars to fill the space. I think that is why someone would use this feature in the first place, to see more price bars, work with that expanded view, maybe add a trend line or two, and then return the chart back to its original size.