EAs that are enough to buy in the MQL5 market, EA is automatically installed into the script directory during installation.

[Waichun Liao]

As the title says, copying the EA to the EA installation directory is also not available. Please ask the moderator to help answer

[Marco vd Heijden]

You mot likely bought a Script in stead of EA.

[Waichun Liao]

The determination to buy is EA.

[Marco vd Heijden]

Well check it again because if it goes to the script folder then it is most likely a script.

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

Mistake. No button "Download Trial"

Maxim Kuznetsov , 2018.12.07 08:47

I suspect that the EA is simply written in the old style, with the functions start () instead of OnTick ()

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

Any question novice, so as not to litter the forum. Pros, do not pass by. Without you nowhere - 6.

Konstantin Erin , 2017.11.16 06:02

instead of calling the start function, call the required function

In new builds, instead of start, other names are more fashionable: OnTick in the Expert Advisor, OnCalculate in the Indicator and OnStart in the Script

... 

[Eleni Anna Branou]

Waichun Liao:
The determination to buy is EA.

You may think that you've bought an EA but many times the actual product is a script.

If it has been installed in the Scripts directory, then its a script.

[Sergey Golubev]

There is one article which every seller on the market should read: it is about validation of the Market products - 

---------------- 

The checks a trading robot must pass before publication in the Market

Why products are checked before they are published in the Market 

Before any product is published in the Market, it must undergo compulsory preliminary checks, as a small error in the expert or indicator logic can cause losses on the trading account. That is why we have developed a series of basic checks to ensure the required quality level of the Market products.

• How to quickly catch and fix errors in trading robots
• Insufficient funds to perform trade operation
• Invalid volumes in trade operations
• Limiting Number of Pending Orders
• Limiting Number of Lots by a Specific Symbol
• Setting the TakeProfit and StopLoss levels within the SYMBOL_TRADE_STOPS_LEVEL minimum level
• Attempt to modify order or position within the SYMBOL_TRADE_FREEZE_LEVEL freeze level
• Errors that occur when working with symbols which have insufficient quote history
• Array out of Range
• Zero Divide
• Sending a request to modify the levels without actually changing them
• Attempt to import compiled files (even EX4/EX5) and DLL
• Calling custom indicators with iCustom()
• Passing an invalid parameter to the function (runtime error)
• Access violation
• Consumption of the CPU resources and memory
• Articles for reading

If any errors are identified by the Market moderators in the process of checking your product, you will have to fix all of them. This article considers the most frequent errors made by developers in their trading robots and technical indicators. We also recommend reading the following articles: 

• How to Write a Good Description for a Market Product 
• Tips for an Effective Product Presentation on the Market.

[Sergey Golubev]

Updates in Rules to improve Market products - important updates in Rules, affected by July 1, 2021 (for the validated sellers in the Market)

[Mahsa Farjami]

Hi Im a developer. I published a utility but after download, it goes to script section. I should check the utilities code? Do you know how can i correct the codes?