Chart upgrade

Please make the chart show stock price in increments like round numbers. For example $100, $100.5, $101, $101.5. Current chart show increments like 101.33, 102.48 which are not round numbers.

Next allow y-axis on chart to be zoom in or zoom out independent of x-axis. Need a disable feature for auto zoom of chart.

Add option to customize color of app skin. Now its dark or white mode only.