One child comments makes a better suggestion. Display only a change in % since period start. Who cares about the absolute price. You only care about percentage change.

And yes, all charts would automatically start from 0 as a side effect.

there are definitely times when you care about absolute price—e.g., if you are trading options that strike at given prices, or if the company has convertible debt that can be converted at a given strike price, or if there is a risk of the exchange delisting you if you consistently trade below $1.

this would be a good toggle but both matter

Change could go to negative though, so even though 0% is included in the chart, the true possible bottom value of the chart is -100%.