Help: Zig Zag features

Hello,

Thank you for coming into my thread.

I am attaching the default Zig Zag indicator that is created by MetaTrader 4.

I would like to ask for your expertise on helping me to create the Zig Zag indicator wit the following features:
- Extended to the last candlestick (with option to on and off); and
- Alert function whenever there is a change in the Zig Zag line direction (with option to on and off).

Thank you.