Expert With ROC Iindicator

hello, I would like to create an expert advisor by combining 3 values ​​of the same indicator, the indicator in question is the ROC (rate of change) example: when the rock period 100 is over 0 line and roc period 50 is over 0 line, to open the position buy roc with period 20 exceeds level 0, at this point the expert opens a buy position. to close the position the fastest roc has to go down the value of -5. the values ​​of each roc should all be customizable and if possible using the inverse settings for the short part. There should be an option to select in the expert if you only want buy, sell or both positions, thank you very much!