I want to highlight the the close on Tradestation tick bars, would appreciate advice on accomplishing this. THanks

You can format the OLC bars to use a different color or weight.

If you want something that stands out more, use the Custom 1 Line indicator and set the formula to Close. Set the scale to Same as Underlying and set the color and plot style as you wish. For example, a large red cross really stands out against the default green bar.

I also use this method as a quick way to test new ideas without having to go through all the steps to program something from scratch.