All, just one more question then – as I’m relatively new to programming with PRT, hopfully that isn’t too stupid: Is it possible to write an own PRT code that displays the tradional Renko chart but allows as well to add indicator lines such as trend lines?

PRT 10 allows to display a chart in Renko style so the code behind uses a feature to advance not on time step based upon the criteria that a new Renko box was formed.

I did some primitive testing but learned that the PRT “return” instruction – which is mandatory – causes a chart to advance by one tick or time step according of the incoming data stream. So what I would need is a way to advance the chart not by the incoming time tact, but according to criteria depending on price. Thanks for another quick hint. (I checked the PRC website but cannot find any code which presents a kind of ordinary Renko charts. All what seems to be available are codes that overlay Renko boxes on time-based charts, to these charts keep the linear advancement on the time axis – what is opposed to the Renko idea to eliminate the time aspect.)