Specify limit order on chart without typing in a price

Instead of having to type in a price (which takes some time because I have to type 7 digits plus a decimal point, without a typo), I would like to be able to specify a limit order whose price is based on the position of the mouse pointer in the chart.

For example, there could be a button to turn on "click to place limit order on chart" tool. Clicking it would modify the mouse pointer's behavior so that, as I move it over the price chart, it shows what the price is at that point.

Clicking the mouse button would cause a limit order to appear on the chart at the price where the mouse pointer is located on the chart. If the price is above the current price of the product, it will be a limit sell order. If it is below the current price, then it will be a limit buy order.