Where Can I Find Drawing Tools?
Tap twice anywhere on the chart to full screen the chart or tap once on the "Full-Screen" icon. Tap the Pen icon on the bottom bar.
How do I Draw on The Chart?
You can choose a type of line and draw lines at the corresponding position on the chart. After that, you may drag the lines to adjust the position, change line color and width or delete lines you have drawn.
Here are several drawing and marking tools for you to create your own analysis on the chart.