previous candle

 
Hello Please tell me how to calculate the value of high low open close previous candle? Maybe just a piece of code there ...
 
prt:
Hello Please tell me how to calculate the value of high low open close previous candle? Maybe just a piece of code there ...
Previous candle before which candle ?  the current candle ?  High[1], Low[1], Open[1], Close[1]  please read the documentation and the Book.
Reason: