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                                                   Set Global Variable Between Strategy and AMM

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swalk10
2014-08-28 19:59:42


I would like to calculate and set a variable in the strategy section of a trading system; for example Risk On (1 or 2). I would then like to pass and access the value of this global variable result as a vector in AMM.

Can that be done, and could you kindly point me to some syntax example?

Thanks!



QuantShare
2014-08-29 04:51:24

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Best Answer
You can do this by creating a global variable then referencing that variable in the MM script.

Here is how:

QS language:
You must first create a custom function "Ex: SetGlobalVar" that creates a global variable using "Global.SetVariable". After that in your system's formula, type:
SetGlobalVar("myvar_".GetSimSetting(_SimulationID));

MM Script:
double a = (double)Global.GetVariable("myvar_" + Functions.SimulationID);

You can access "Functions.SimulationID" only in the "OnStartSimulation" event. If you want to use it in other events, then create a variable in the "Global" event and fill it with the value retured by "Global.GetVariable"



swalk10
2014-08-29 08:29:47

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Perfect, thank you very much!


SergejSuperstock
2016-04-28 14:51:52

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Strategy:
iRank = comp(dScore, "rank", 1, bFilter);
mySetAmmVariable("giCurrSymbolRank", iRank);

Custom function "mySetAmmVariable" (varName is string parameter, varValue is number parameter):
Global.SetVariable(varName[0], varValue[0]);

AMM OnNewPosition:
int iCurrSybolRank = (int)Global.GetVariable("giCurrSymbolRank");


This does not run. Problem is at calling of "mySetAmmVariable" in Strategy. Can anybody help? Thanks in advance!



QuantShare
2016-04-29 06:37:49

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Do you have a custom function called "mySetAmmVariable"?

You need to create one in "Tools -> Create Functions" or you can download this one from the sharing server:
Set Global Variable





Set Global Variable (by QuantShare, uploaded several months ago)
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SergejSuperstock
2016-05-02 14:07:46

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Thanks for your reply! Yes I have a cf, see above at "Custom function". But I found the error, comparing to your suggested function: When calling my custom function in the strategy window, I need to assign the return value to a variable, temp in this case. So the correct code is:

Strategy:
iRank = comp(dScore, "rank", 1, bFilter);
temp = mySetAmmVariable("giCurrSymbolRank", iRank);

Custom function "mySetAmmVariable" (varName is string parameter, varValue is number parameter):
Global.SetVariable(varName[0], varValue[0]);

AMM OnNewPosition:
int iCurrSybolRank = (int)Global.GetVariable("giCurrSymbolRank");



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Trading financial instruments, including foreign exchange on margin, carries a high level of risk and is not suitable for all investors. The high degree of leverage can work against you as well as for you. Before deciding to invest in financial instruments or foreign exchange you should carefully consider your investment objectives, level of experience, and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment and therefore you should not invest money that you cannot afford to lose. You should be aware of all the risks associated with trading and seek advice from an independent financial advisor if you have any doubts.