Recently I saw an indicator, I think on Tradestation, that translated Time and Sales data to a histogram. I have not seen its equivalent on Ninjatrader. Is anyone familiar with this indicator? How might I get a version of it programmed for Ninjatrader?

You could also look at Jigsaw tools (a ninjatrader plugin).
Their DOM has two Current Trades columns with histograms. They show what is trading at that time at that price on the DOM and overwrite when price moves away then comes back to a price. So in effect a Time and Sales on the DOM so it is easy to see the price level the Bid and Ask volume is being transacted at.

Thanks for the suggestion. Not really up on Jigsaw; this would be a good incentive to learn.

BTW, I'm a fan of Giacommeti; what's your interest in the "Walkin Man?"

Steve