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Guide Trackers are supervised trackers, added before automated tracking. Pre- existing trackers are automatically used by the automated tracking system to re-register frames as they move. With this guidance, the automated tracking system can accommodate more, or crazier, motions than it would normally expect.
Unless the overall feature motion is very slow, you should always add multiple guide trackers distributed throughout the image, so that at any location in the image, the closest guide tracker has a similar motion. [The main exception: if you have a jittery hand-held shot where, if it was stabilized, the image features actually move rather slowly, you can use only a single guide tracker.]
Note : guide trackers are rarely necessary, and are processed differently than in early versions of SynthEyes.
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