
- www.mql5.com
P.S. you can delete the link from forum (you previous reply)
EA then will be functional on demo only.
I experienced this problem now after updating chrome browser, I don't know why this would have something to do with it, but after updating chrome to the latest build - all free and paid indicators in my market directory stopped working with 538 invalid license error.
I could only solve the problem by moving all ex5 files out of the market folder into a backup folder, and then by reinstalling things from the marketplace. Is there any better solution?
I experienced this problem now after updating chrome browser, I don't know why this would have something to do with it, but after updating chrome to the latest build - all free and paid indicators in my market directory stopped working with 538 invalid license error.
I could only solve the problem by moving all ex5 files out of the market folder into a backup folder, and then by reinstalling things from the marketplace. Is there any better solution?
Yes, that's right. Because invalid license means the following: the product has invalid activation/license. Why? The activation was lost because of major Windows update (or hardware update, or using computer as Administrator or similar):
Forum on trading, automated trading systems and testing trading strategies
Sergey Golubev, 2022.12.19 06:14
The activation of Market products is per software with hardware (and per the system configuration as well).
If you updated your Windows (critical update) so you need the other activation for your products.
It means: delete all your products from Metatrader and install them once again (from same Metatrader); yes, one activation will be lost because of that.
More (from this post #6) -
----------------
As to "invalid license 538" ...
You can delete your purchases from Metatrader and install them once again (from same Metatrader).
If you do not see your purchases in new Metatrader instance - use the following procedure from the service desk:
Forum on trading, automated trading systems and testing trading strategies
The purchased tab is only showing the last two purchases
Alexey Petrov, 2021.01.19 11:17
Even if a Market product is removed from the showcase, those who already purchased it, can install it anytime from their MetaTrader terminal (Market \ Purchased section).
In case you don't see the product on the list of your purchases in the terminal, try the following:
- Close all your MetaTrader terminals
- Go to C:\Users\{user name}\AppData\Roaming\MetaQuotes\Terminal\Community
- Delete all files starting from mql4.market.* and mql5.market.*
- Open MetaTrader terminal
- Try to install product again

- 2022.03.01
- Tony1801
- www.mql5.com
Yes, that's right. Because invalid license means the following: the product has invalid activation/license. Why? The activation was lost because of major Windows update (or hardware update, or using computer as Administrator or similar):
More (from this post #6) -
----------------
As to "invalid license 538" ...
You can delete your purchases from Metatrader and install them once again (from same Metatrader).
If you do not see your purchases in new Metatrader instance - use the following procedure from the service desk:
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invalid license (538), please reinstall from MQL5 Market
I have researched this error but my case is pretty unique:
I have downloaded and installed a free Indicator: ATR Stop Loss Finder, It works just fine, I can switch between different broker's account and it will work just fine on any chart ( DEMO , LIVE , etc )
I wanted to integrate this indicator in a custom made EA.
If I run this EA under the DEMO account it works just fine, but if I try to run it under the LIVE account it gives me that error:
That is odd, I've uninstalled, reinstalled, created a new MQL5 account and tried installing with that. Nothing.
Can anyone help ?