If your indicator is not plotting as expected - especially after updating the indicator - it may be that you're applying an outdated template for that indicator. This can happen if you previously saved a chart template or an indicator settings template and then update the indicator. For example, here's how MQ Momentum appeared after a recent indicator update. Notice how the histogram plots and even the fast and slow line plots don't look as they should. This is because the order of the plots likely changed, and the template settings are being applied to the wrong plots.
A simple fix is to reset the indicator settings back to their default and then resave the template. To do this, open the indicator's properties and select template in the lower right of the indicator. Then select reset as shown circled in red below. Check to see if this resolves the issue. If it does, you can re-save the chart and/or indicator template if you are using one, and then re-apply the chart template to other charts with the same issue.