Tradelink Coding Help

Hi,

I would need some help to code a standard deviation of 2 moving averages in Tradelink. Here is what I have for the MA:

string _asymb = "AAA";
string _bsymb = "XXX";
int _barsback = 15;
public string Asymb { get { return _asymb; } set { _asymb = value; } }
public string Bsymb { get { return _bsymb; } set { _bsymb = value; } }
public int BarsBack { get { return _barsback; } set { _barsback = value; } }

//Moving average calculation with closing price, stock A
decimal ma_aprice = Calc.Avg(Calc.Closes(blt[_asymb], BarsBack));

//Moving average calculation with closing price, stock B
decimal ma_bprice = Calc.Avg(Calc.Closes(blt[_bsymb], BarsBack));


//some type of calculation with 2 Moving Averages
decimal ma_twosymb = ma_aprice - ma_bprice;


decimal std = Calc.StdDev((Calc.Closes(blt[ma_twosymb], BarsBack)));

When I do the Standard Deviation of ma_twosymb, I get this message:
Error: The best Overloaded method match for Tradelink.Common.BarListTracker.this[string]' has some invalid arguments.

I just started coding, if anyone could offer some help.


Thank you,

Ink

 

if you join the users list somebody will help you with this.

google tradelink project or community.tradelink.org