number of decimals is not the right criteria

Please change the chart precision criteria in chart settings to the number of significant digits. This is required because of the wildly variant most significant digit for various CME contracts. For example, for oil I require 2 decimals to give me say 69.56 and for the pound I require 3 decimals to give me for example 1.275. In order to flip between many charts I would need to often change the number of decimals, but a selection of 4 significant digits would be invariant.