The CCI indicator I wrote

{- - -CCI - - -}

R: =C;

D: =20;

WIDTH: =2;

CCI: = (R-MA (R, D)) *100/ (WIDTH*STDP (R, D));

{- - - CCI END - - -}

User experience: CCI and Bollinger Bands are designed using standard statistical theory to try to achieve quantitative analysis of overbought and oversold to find the top and bottom positions. However, in fact, it can be seen from the actual chart that it always rises and continues to rise; once it is at the bottom, it can go back to the bottom, and it is often used by institutions to deceive. Moreover, a simple average line is used in the design, and the actual situation of delayed response is inevitable, so it is not recommended to use it. Believing in the bottom often makes it difficult for people to get over in a deep situation.