Trendlines Shift on Nonlinear Charts

Trendlines need price & time in order to plot. On a nonlinear chart, time cannot be predicted, so MotiveWave will estimate the endpoint, therefore, the trendlines in this case may shift .

You can plot the endpoint on the previously plotted nonlinear bar or wait until the current bar closes. The endpoint can then be extended, and it should stay stationary at a fixed angle. Trendlines will only be plotted exactly from timeframe to timeframe if the new timeframe has enough data loaded.

What you could do is double-click the chart to bring up the Chart Settings, try enabling the Resolve Trend Lines option. Be warned, having this enabled can load quite a bit of data which will increase loading times.

In addition, make sure that the Config > Preferences > Chart > Chart Settings > Line Method is set to angle and not time/price. The only thing is that this will apply to all lines on all charts.