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PureBytes Links
Trading Reference Links
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First and foremost, read the user guide:
http://www.amibroker.com/guide/
Specifically, familiarize yourself with every AFL function:
http://www.amibroker.com/guide/afl/afl_index.php?m=2
At which point your questions would be immediately answered without need for a "competent" group ;)
1. Foreign or SetForeign/RestorePriceArrays
http://www.amibroker.com/guide/afl/afl_view.php?id=54
http://www.amibroker.com/guide/afl/afl_view.php?id=247
2. SetPositionSize
http://www.amibroker.com/guide/afl/afl_view.php?name=setpositionsize
e.g.
SetForeign("$SPX");
SPXMA200 = MA(Close, 200);
Flag = Close > SPXMA200;
RestorePriceArrays();
// 5% size when above MA, 1 % otherwise
SetPositionSize(IIF(Flag, 5, 1), spsPercentOfEquity);
3. Sum
http://www.amibroker.com/guide/afl/afl_view.php?name=sum
e.g.
Buy = Sum(Close > MA(Close, 65), 3) == 3;
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "jchi18" <inbox.chi@xxx> wrote:
>
> Now that I've found a competent group that seems willing to help, I would like to pose some questions:
>
> 1. What is the best way to reference an index (i.e., S&P 500) and depending on the condition of that index the formula would indicate a buy signal for stock A or a sell signal for stock B? I am trying to create a simple formula that trades two ETFs (MDY for longs and MYY for shorts).
>
> 2. Is there a way to change your position size depending on variables? For instance, I would like to increase the size of my buys and decrease the size of my shorts in the case where the overall market (i.e., S&P500 close > its 200 MA) is in an uptrend. And vice versa.
>
> 3. I have been reading some books and I wanted to emulate a formula that I read about. It's very simple but I can't figure out how to do it simply. If there are three consecutive closes above the 65 SMA, then buy. If there are three consecutive closes below the 65 SMA then sell. Any thoughts on how to do it?
>
> Thanks again for everyone who helped me before. I'm going to guess that you'll be hearing a lot from me.
>
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