Testing and optimization of Expert Advisors is performed using the so called agents —special services that perform calculations. There are three types of agents:
All agents are shown in a table divided into two parts - local and remote agents:
•Agent — name of the agent. Agents are named automatically according to the number of the logical core;
•Hardware — this column contains information about the type of the processor, CPU clock, RAM size and internal performance rate (the higher the rate is, the the more powerful the hardware is);
•Tasks — number of test runs performed by the agent during the current process of optimization.
•Progress — progress of testing performed at the agent;
•Status — the status of the agent: busy, ready, unavailable.
Press " Select" in the context menu to select one of the agents that will be used in testing (one-time run). During optimization, calculations are distributed among agents automatically.
Any agent can be disabled. For example, if you test and optimize on a notebook, you can disable local agents. To do this, go to the agent setup by pressing " Edit". In the appeared window remove the check mark from the "Enable" field. Disabled agents are marked by icons and .
Local agents are installed automatically with the client terminal. The number of available local agents (started on the computer where the terminal is installed) is equal to the number of logical cores of the processor. They are created automatically.
A remote agent is a specialized service installed on any computer and used for testing and optimizing Expert Advisors in the strategy tester. The tester allows working with the unlimited number of remote agents using all available computation powers. All you need for using an external agent is knowing the address and port for connecting to it, and its password.
In order to add an external agent, click " Add" in the context menu of the remote agents section. As soon as you do it, the wizard of adding agents will appear:
Currently this wizard allows adding agents in two ways: by specifying an IP address or domain name, or by importing from a file:
•Add agents from host
•Import from *.mt5 file
The list of agents to be added is displayed at the next step:
The parameters of agents are displayed here. To add the agents, click the "Finish" button.
In order to change settings of an agent, execute the " Edit" command in its context menu. The following window will appear after that:
The following fields are available here:
•Name — name of the agent;
•Address — IP address and port for connecting to the agent, separated by a colon;
•Password — password for connecting to it;
•Enable — this option allows to enable or disable the agent.
In settings of local agents only the option of enabling/disabling them is available.
To make setting up of remote agents easier, the feature of importing and exporting of their settings is implemented in the client terminal. The files of settings have the *.mt5 extension. The import and export commands are located in the context menu of the "Agents" tab.
Files of settings have the following format: Name;Address:port;Password;Description;Enable.
•Name — name of an agent;
•Address:port — IP address and port for connecting to an agent, separated by a colon;
•Password — password for connecting to it;
•Description — description of hardware an agent works on;
•Enable — mode of an agent operation: 1 — agent is enabled, 0 — agent is disabled.
Settings of different agents are separated from each other with line breaks.
Under the list of local and remote agents, you can find the list of agents that belong to the cloud computing network — MQL5 Cloud Network:
Advantages of the MQL5 Cloud Network
The MQL5 Cloud Network allows you to quickly optimize your Expert Advisors using the power of thousands of computers. The network combines remote agents and distributes optimization tasks among them. The Strategy Tester connects to the cloud network through multiple access points, which are distributed on a territorial basis (e.g., MQL5 Cloud Europe). For each access point, the number of agents currently connected to it is shown.
Since the purpose of the MQL5 Cloud Network is to provide the most efficient use of resources of the network members, will not see all the available agents before starting the optimization process. If an agent does not perform tasks, it switches to the sleep mode. As soon as you start optimization, depending on the number of required passes, more and more agents will join the work:
Within 30-60 seconds thousands of agents will be available for you to perform your task.
Use of the MQL5 Cloud Network
To start using agents of the network, enable them using the " Enable" in the context menu. Since the MQL5 Cloud Network is a paid service, a user must have an account at the MQL5.community website, through which all the accounting operations are performed. The account details should be specified at the "MQL5.community" tab in the terminal settings.
If the details of an MQL5.community account haven't been specified before enabling the MQL5 Cloud Network agents, the following window is shown:
In this window, you should specify the details of your account at MQL5.community. If you're not registered yet, use the corresponding link to create a new account.
The following commands can be executed from the context menu of the "Agents" tab:
• Select — enable the default use of a selected agent for testing;
•Allow to Use — open the submenu for group managing of agents:
•Local Agents — enable/disable all local agents;
•Remote Agents — enable/disable all remote agents;
•MQL5 Cloud Network — enable/disable all agents that belong to the MQL5 Cloud Network;
• Add — open the window of external agent addition;
• Edit — open the window for editing the selected agent;
• Delete — remove a selected external agent;
• Enable — enable a selected agent or a group of agents. To work with a group of agents, select them holding the Shift or Ctrl key;
• Disable — disable a selected agent or a group of agents;
• Import — import the settings of remote agents from an external text file;
• Export — export the settings of remote agents to an external text file;
•Animation — enable/disable the animation of CPU loading by agents. The animation should be disabled if you have a lot of agents; it allows saving CPU resources;
•Auto Arrange — enable/disable automatic arrangement of the column size;
•Grid — show/hide grid to separate fields.
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