In order to draw the arrows on the chart for this indicator, we utilize a TradeStation font. This font should have been installed when you installed the TradeStation program onto your computer.
Some people are missing this font so it requires them to install it manually in order for the arrows to show up.
Steps to resolve:
1. Download the TradeStation Arrow font here: TradeStationArrows
2. Locate the downloaded font file and right-click on it and select install from the menu.
3. Restart TradeStation