Currently the chart-zoom is controlled by the pinch or spread motion (touchscreen). This motion also controls the period or range of viewable chart. The dual function of pinch/spread (radial movement) inevitably causes the head or tail to move out of view. Most often, the end of the chart is what I need to analyze, but I can only see it at default scale. Being able to drag the chart left and right, without re-scaling, could solve this. Thank you.