Giới thiệu về MQL5 (Phần 14): Hướng dẫn cho người mới bắt đầu xây dựng các chỉ báo tùy chỉnh (III)

This is doing calculations for all lookback bars every time a new bar is closed. In order not to do that you will need to have phval, phloc, plval and plloc as buffers. While the terminal does not manage complicated structures as buffers, you will have to do the buffer management all by yourself.