This article treats an aspect in a larger research agenda to understand DJ practices, which are an important part of popular music culture: We present a heuristic algorithm that estimates cue points where tracks should cross-fade in a DJ mix. We deduced statistics and heuristics from a list of rules provided by human experts, and from a database of example tracks with given cue regions. We then created an algorithm for cue-point estimation based on rich automatic annotations by state of the art MIR methods, such as music structure segmentation and beat tracking. The results were evaluated quantitatively on the example database and qualitatively by experts.