Does anyone know the real algorithm of CDP AH NH AL NL in communication letters?

Yesterday's highest price: =REF(H,1);

Yesterday's lowest price: =REF(L,1);

Yesterday's closing price: =REF(C,1);

Average price: (yesterday's highest price+yesterday's lowest price+yesterday's closing price)/3;

Ah: 2* average price+yesterday's highest price -2* yesterday's lowest price;

NH: average price+average price-yesterday's lowest price;

NL: average price+average price-the highest price yesterday;

AL:2* average price -2* yesterday's highest price+yesterday's lowest price;

So, you can understand. If you don't understand the algorithms and the relationship between them, you will be really helpless.