Greetings,
I had searched the internet fruitlessly for codes that can modify chart viewing time frame, let’s say a 20min frame.
Any assistance is much appreciated.
Please assists! 
Greetings all,
I have managed to solve the problem by installing this script. Just for the info and benefit of whoever having the same doubt as mine.
- Download the script
Period Converter Optimized - MQL4 Code Base
- Follow these instructions
Timeframe of the chart - MQL4 forum
- Finally, remember to restart your software (close and open again) in order to get the script working.
Enjoy