In UI trendline, Degree (for Polynomial trendline) and Period (for moving average trendline) are limited to arbitrary values (respectively 10 and 100). The upper value should be calculated according to the number of points. max Degree = Nb of points - 1 (+ 1 if intercept is forced) max Period = Nb of points - 1
Laurent Balland-Poirier committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=5707c81218c3212bd2e62c274f3169cd0d6cbba2 fdo#77739 UI trendline: limit max values of Degree and Period The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Assuming the above commit is all that’s needed, closing.