Types of Interaction Controls

Variable (Name example)	Description	Type	Default value (description)	Component configuration (description)	Remarks
cmdNum	Description of interactive control cmdNum	Number	Default value is optional and can be left blank	Used to set the interface controls bound to the current interactive item: component type, minimum value, maximum value, grouping, etc.	Notes on the interactive control cmdNum
cmdBool	Description of the interactive control cmdBool	Boolean (true/false)	Default value Required, on or off	Same as above	Notes on the interactive control cmdBool
cmdStr	Description of the interactive control cmdStr	String	Default value is optional and can be left blank	Same as above	Notes on the interactive control cmdStr
cmdCombox	Description of the interactive control cmdCombox	Selected	Default value is optional and can be left blank	Same as above	Notes on the interactive control cmdCombox
cmdBtn	Description of the interactive control cmdBtn	Button	Button control is not bound to input item	Same as above	Notes on the interactive control cmdBtn

The message sent to the strategy after the interactive control is triggered (string): - Number After entering the interactive data “123” in the interactive control

"GetCommand()" function in the strategy program will receive the message
"cmdNum:123".
- Boolean
Set the switch control of the interactive control ```cmdBool``` to on, and
click the button of the interactive control cmdBool. The
```GetCommand()``` function in the strategy program will receive the
message: ```cmdBool:true```.
- String
After entering the interactive data: ```abc``` in the interactive
control ```cmdStr``` input box, click the interactive control cmdStr button.
The ```GetCommand()``` function in the strategy program will receive the
message: ```cmdStr:abc```.
- Selected
After selecting the second option in the drop-down box of the
interactive control cmdCombox, click the button of the interactive
control cmdCombox. The ```GetCommand()``` function in the strategy
program will receive the message: ```cmdCombox:1```, where 1 represents
the index of the selected option, the first option has an index of 0,
and the second option has an index of 1.
- Button
Click the button of the interactive control cmdBtn. The
```GetCommand()``` function in the strategy program will receive the
message: ```cmdBtn```.

Application of interactive controls: Dynamic modification of strategy parameters
For example, the strategy has a parameter called symbol. The strategy parameters added on the strategy interface are also global variables, so the global variables in the code are used here as a demonstration.

```js
// Strategy parameters
var symbol = "BTC_USDT"

function main() {
    while (true) {
        var cmd = GetCommand()
        if (cmd) {
            var arr = cmd.split(":")
            if (arr.length == 2 && arr[0] == "changeSymbol") {
                // When the changeSymbol control is detected, the parameter update operation will be performed
                Log("Modify the symbol parameter to:", arr[1])
                symbol = arr[1]
            }
        }
        
        LogStatus(_D(), "，The current symbol parameter values are:", symbol)
        Sleep(3000)
    }
}

Set up interactive controls:

Strategy Parameters Component Configuration