Convert MQL5 code to MQL4 and make change

I have a MQL5 code which turn off auto trading when choppiness index reached certain level and turn on auto trading again also based on choppiness index

I would need help to do the following:

1. Convert the MQL5 code into MQL4

2. On the converted MQL4 code, change the choppiness index part to ADX instead, now the logic will be:

    - Turn off auto trading if ADX below the threshold; Turn on auto trading if ADX above the threshold

3. On the converted MQL4 code, change the close all pending orders part to close all pending and opened orders

Many thanks