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There is an option on the chart attributes to use Log Scale on the price chart. Log Scale is pretty neat as it can allow you to see a little more perspective perhaps on the chart.
You can also use Log Scaling on your Indicators that are related to a symbol. For example the Price Indicator. You put a symbol into the parameter box and it displays where you put it. This information is presented on the pane with with a linear scale. If you want to have it displayed in a Log Scale you just need to add a comma and the word LOG, after the symbol in the parameter box
Erin Swenlin did a post recently using this type of scale on the indicator. I added the panel below her's that shows the linear scale of the same symbol