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# MT4 Client Library
[](https://pkg.go.dev/go.popov.link/metatrader4)
[](https://codecov.io/gh/valentineus/go-metatrader4)
A lightweight Go client library for interacting with a MetaTrader 4 (MT4) trading server over TCP.
## Example Usage
```go
import "go.popov.link/metatrader4/mt4"
client := mt4.NewClient("127.0.0.1", 443,
mt4.WithDialTimeout(3*time.Second),
mt4.WithAutoClose(true),
)
ctx := context.Background()
params := map[string]string{
"login": "55555",
"password": "_some_password_",
}
res, err := client.Execute(ctx, "WWAPUSER", params)
```
The `Execute` method sends a raw MT4 command. Parameters are encoded using base64 and Windows-1251.
Use `WithAutoClose(false)` if you want to reuse the connection manually via `client.Close()`.
## Options
- `WithDialTimeout(d time.Duration)`: Sets the timeout for establishing a TCP connection. Default: 5s.
- `WithReadTimeout(d time.Duration)`: Sets the maximum time to wait for a server response. Default: 5s.
- `WithWriteTimeout(d time.Duration)`: Sets the maximum time to complete sending a request. Default: 5s.
- `WithAutoClose(enabled bool)`: If `true`, closes the connection after each `Execute` (default). Use `false` to reuse the session manually via `client.Close()`.
## Requirements
- Go 1.24 or later
- MetaTrader 4 server with TCP access
## Maintainer & Project Info
- Vanity import path: `go.popov.link/metatrader4`
- Source mirror (read-only): [code.popov.link](https://code.popov.link/valentineus/go-metatrader4)
- Issues and contributions: [GitHub](https://github.com/valentineus/go-metatrader4/issues)
Maintained by [Valentin Popov](mailto:valentin@popov.link).
## License
This project is licensed under the [MIT License](LICENSE.txt).
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