The AUTOSCALE function is limited to the Y axis on the STRIPCHART. If a data point is added whose Y value is beyond the edge of the chart and the AUTOSCALE mode for the Y axis is on (value of 1), the window is rescaled to make room for that data point.
This mode should not be used in time-critical STRIPCHART applications because it can cause a delay at an unpredictable time while the entire chart is redrawn. The use of this limited AUTOSCALE feature on a STRIPCHART does not eliminate the need to set the ORIGIN and RANGE attributes to reasonable initial values for both X and Y axes.
