As with normal IFrames / script code can also be done in real-time bidding click tracking. For this purpose (external click tracking with IFrames / Scripts see.) The corresponding parameter is the RTB request URL &rdclick= / &rdclick_0= / &rdclick_1= / ... appended.
As this is the RTB to the forwarding of the advertisement and not a direct delivery to the user can here instead of the click-through URL and the click macro of the respective ad server are appended (eg &rdclick_0=%%CLICK_URL_ESC%% at DoubleClick).