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I can't give a complete answer, but here are some tidbits I have
picked up along the way:
(1) Check out the 3rd party timeframe.dll for referencing various
periods of time in your formulas
(2)if(TimeNum()==093000) - This line will not work b/c you cannot
reference an array within a loop. You could do something like this
though:
TimeVar = TimeNum();
if(TimeVar[i] = 093000)
This wouldn't really work but the point is you must reference a
specific point within the array, in this case [i].
Think of it like this: A "normal" AFL function iterates each line as
a full array, so that "yourarray"=iif(H>MACD(),1,0); calculates the
return of 1 or 0 for every data point - in other words every bar in
your chart. However, a looping function lets you control what to
calculate, so that "yourarray" can be controlled only to hold 1
value, for example at bar 1 of your chart.
So, If your chart had five bars your data could look like this:
B1 B2 B3 B4 B5
"yourtypAFLarray" 0 0 1 1 0
"yourlooparray" 0 1
Here's some code that may help:
day = 0; //your day array
time = 0; //your time array
for(i=1;i<BarCount;i++)
{
time = time + 1; //assume for example time in hrs. and 6 hrs./day
day = Iif(frac(time/6)==0,day+1,day);
...other commands}
--- In amibroker@xxxxxxxxxxxxxxx, "g_r_e_g_69" <gregoliver_@xxxx>
wrote:
> I am currently doing some backtesting on a bunch of (1 minute)
> intraday data and am looking to create a few indicators that
> accumulate throughout the day but reset to a certain level at the
> beginning of every new day. However, I am an inexperienced
> programmer and am not yet very proficient at creating loops.
Perhaps
> someone out there can help me. How can I create an indicator with
a
> loop that shows the intraday high and low?
>
> Here's what I tried so far (it didn't work)...
>
>
> IntradayH[0]=High[0];
> IntradayL[0]=Low[0];
>
> for(i=1;i<BarCount;i++)
> {
> if(TimeNum()==093000)
> {
> IntradayH[i]=High[i];
> IntradayL[i]=Low[i];
> }
> else
> {
> IntradayH[i]=max(IntradayH[i-1], High[i]);
> IntradayL[i]=min(IntradayL[i-1], Low[i]);
> }
> }
> Plot( IntradayH, "High", 27); Plot( IntradayL, "Low", 32);
>
>
> NOTE: I know that I can create the intraday high/low with the
> following AFL code...
>
> IntradayH = IIf(TimeNum() == 930000, High, HHV(High, BarsSince
(TimeNum
> () == 093000)));
> IntradayL = IIf(TimeNum() == 930000, Low, LLV(Low, BarsSince(TimeNum
> () == 093000)));
>
> ...but I want to know how to do it with a loop because I have a
> couple of other ideas that also need to be reset at the beginning
of
> each day, but are too complex to code without a loop (without the
> program crashing). If anyone can help it would be much appreciated.
>
> Greg
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