When a goal becomes complete, you can continue but your data is hidden away as history. I know we can contact you to have it re-shown, but it would be kind of nice if you could decide at any time (even during active goals) how much history you'd like to see. After enough time passes, your data points get very tiny in order to be able to show all the dates.

So, I propose having a button/setting that allows you to choose from options like show all data, last month, last 2 months...