Thank you, it works fine, but what is 'MirrorLabels' ? Is it a new property of TWindRose? (I'm using TeeChart Pro 6)
Jürgen

Thank you for the nice and useful TWindRoseSeries! But how can I change the text of the CircleLabels of this series ? The labels NEE, SEE, SWW and NWW should be displayed correctly as ENE, ESE, WSW and WNW, and for my German applications I want to translate E (east) to O (Ost). Thank you for your ef...