ProTools Fader meters usually shows the Signal that was recorded to disk.This is called “Pre Fader Metering”. If you clipped your signal while recording,or increased its gain with a Plugin ,it will clip in your fader meters.(Both track and Send Meters.) Deselect “Pre Fader Metering” under the “Operations” menu in ProTools , and then adjust your mix , so that your not clipping any more.This will stop the red clipping indicators and improve your overall Mix gain staging.