Set Global Variable

This function allows you to store a variable value globally so that it can be referenced later by any QuantShare tool.

Since variables between a trading system and money management script cannot be shared (The former uses QS language and the latter uses CSharp/C#), you can for example store a trading system's optimizable value into a global variable to be referenced later by the money management script. This way, you can optimize a variable in the trading system formula and use the value of that variable (for each optimization) to perform some other calculation in the money management script.

Example:

Trading system's formula:

Optimize("a", 1, 10, 1);
b = perf(close, a);
buy = b > 2;

// Store variable
sid = GetSimSetting(_SimulationID);
temp = set_global_var("var1_".sid, a);

// Notice that we have added the 'simulationID' value to the variable name so that the money management script can retrieve the correct variable.
// If you don't do that then when using multithreading, you could end up getting wrong values

Money management script:

Global event:
double value = 0;

OnStartSimulation event:
value = (double)Global.GetVariable("var1_" + Functions.SimulationID);

You can now use the "value" variable in any other event.

This is just an example to show you how to use global variables to pass variable between a trading system's formula and a money management script. Of course there are many other uses for this function.

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