IN MT4 I DID DOWNLOAD CUSTOM INDICATOR, COMPILE O.K., BUT WHEN I TRANSFER TO CHART, IT DOES NOT APPEAR. WHAT TO DO?
You would need to attach the indicator for anyone to be able to help you. What you are describing can be caused by a poorly coded indicator or maybe another program deleting the chart objects or something else.
Can you share downloaded "CUSTOM INDICATOR" with us? Without knowing more about it I can not say anything.