Trailing Stop by trendline / AKA JTrader style

Does anyone remember or has used the old futures platform J Trader? They had a pretty neat feature where you could draw a trendline on an open chart position and the system would trail the stop along your trendline. So you open your position, draw a quick trendline under the angle of the move and then as it runs it followed the trendline. There might be some videos on youtube of it in action somewhere.