Need a simple EA with 3 buttons for semi-auto trading

The EA should have an Automatic mode (which it will start/stop itself based on my preset time period), and a Semi-Auto mode (which the EA would only start/stop when I press a button on the chart).

* In Automatic mode:

EA would open a buy limit order when price breaks above the high of the previous bar, and reverse(sell) this order when price breaks below the low of the previous bar. Vice versa if EA open a sell order initially. (See picture)

The EA should keep reversing this order whenever the $ breaks above or below the previous bar, until the EA is stopped.

* In Semi-Auto mode:

There should be 3 buttons on the chart: Buy, Sell, & Stop. When I press Buy, the EA would only submit buy limit orders like the Automatic mode, but exit (instead of reversing) when price breaks below the previous bar's low, and submit buy limit order again when price breaks above the previous bar's high, and the EA should continue to submit buy orders after closing the previous order. Vice Versa for Sell button, and the pressing of Stop button would exit all positions and stop the EA.