[amibroker] Re: Using Index Data to Adjust Position Sizing

["Mike" <sfclimbers@xxxxxxxxx>]

Use Foreign or SetForeign/RestorePriceArrays to access data from a symbol other than the current symbol.

http://amibroker.com/guide/afl/afl_view.php?name=foreign

e.g.

spyMA = MA(Foreign("SPY", "C"), 50);
Buy = ...
standardSize = ...
PositionSize = IIF(spyMA > ..., standardSize, standardSize * 0.5);

Mike

--- In amibroker@xxxxxxxxxxxxxxx, "woodshedder_blogspot" <woodshedder_blogspot@xxx> wrote:
>
> I'm sure this has already been covered somewhere, but the search function is awful and I haven't found anything useful. Feel free to point me to another thread or the manual if what I'm asking has been covered ad nauseum.
> 
> What I want to do is use index data, say maybe the SPY/SPX, to adjust position sizes on trades of common stock.
> 
> In Tradestation, one just uses Data 1 (could be the SPY) and Data 2 (the stock to be traded).
> 
> An easy example of what I want to be able to do is this:
> 1. if the SPY is above the 50 dma
> 2. and there is an entry signal on a stock
> 3. use a full position size
> 4. if the SPY is not above the 50 dma, use 1/2 position size
> 
> I'm not asking for any code, just the basic method of using index data to affect trades.
> 
> Thanks!
>




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