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Indicator works but not works on VPS

Hi. I have my own indicator and he works perfect on my desktop computer but on VPS he don't work. I don't know why

Global variable resets over and over again.

Hi. :) I am a beginner so please be patient. I have a simple code and I want it to run once so I add two global variables. SELL and BUY. I don't know SELL and BUY it resets and code executes over and over again, but I need the code to execute once

how to multiple indicator ? ( mql4)

the question may be funny to someone , but ...... I created an indicator but it only works on one currency pair . How can I make it work on different timefrimes and many other instruments ? Anyone could help me ? Thanks :)

Rectagle price

How to check the highest and lowest price of a rectangle drawn by a mouse in mql4 ? I drew a rectangle as in the picture, but I want to see the price in mql4, can I make it