* This changes the into a percentage, so don't use this number for calculations
* Make sure to set your "bottom margin" to 0% or the chart will appear to be floating above the bottom
Right click anywhere and click Create Alert. Once in there, select NV as the condition, "Crossing", and Value set to 100. Then I usually set the frequency to "Once per bar (on condition)".
If you want a stronger indicator, you could do it at 120 or 150. It may feel too late, but it's still a pretty good indicator that the trend is changing on some direction.