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QuantShare
2013-02-18 10:07:50

  0

"Ref" function does not refer to EOD data. It simply gets the previous value of an array. It works with EOD and Intraday data.

Regarding your indicator, if you see "1" values on a chart then you should get trades.
Let me know how it goes.



umair
2013-02-19 07:59:45

  0

The indicator that I've created is based on DAILY data. Instead of using HistoPrice, I have used REF. Therefore, when I add the indicator on my daily chart, it works great. It gives me the correct values.

Now what I am trying to do is use this indicator (based on daily values) on intraday backtesting. In other words, if this indicator was "1" at the end of trading day on MONDAY, I want to buy/sell at 9:30 the next morning.

There are two things I am confused about.

1) settings for the indicator= so when I created this indicator I had used TA.Ref(open,0) and TA.Ref(close,1) in the logic. The "open" and "close" variables were added using the parameter at the bottom:

open=number=open
close=number=close

Like, I said this works beauty when I added it to my chart (the values are correct). But what I don't understand is when I add this indicator on backtesting screen.. it looks like this:

indicatora(open,close)

The "open" and "close" values that show up..by default are they open=0 and close=1 (as I had it in my indicator)[above^]??

What happens if I change it to:
indicatora(0,10) ??

2) Second thing I'm confused about:

How can I implement a indicator that was created using REF (daily values) into a intraday trading strategy.

So lets assume I want to buy when indicatorA = 1 on daily chart when the time is 9:30AM:

interval settings- 1minute

rule1 = indicatora(open,close) > 0;
rule2 = (hour() == 9 and minute() == 30);
buy = rule1 and rule2

the above doesn't work.

I've also tried:
rule1 = indicatora(0,1) > 0; (my first problem described above)
rule2 = (hour() == 9 and minute() == 30);
buy = rule1 and rule2

this also does not work.

Please help! I'm spending way too much time on this lol
The most frustrating thing is that I have a screener and an indicator created for this logic, both work fine, but when I try to backtest it.. it doesnt work!



umair
2013-02-19 08:49:47

  0

Also any idea why this works in c#:
VectorD a = TA.Ref(open,0) < TA.Ref(close,1);
parameters:
open=open
close=close

but this does not work:
VectorD a = TA.HistoPrice(_open,0) < TA.HistoPrice(_close,1);
parameters:
_open=_open
_close=_close



umair
2013-02-19 10:35:01

  0

Ok I figured out my 2nd question: how to access daily calculations of a indicator during intraday backtesting:

rule1 = TimeframeDecompress(TimeframeApply(-1,indicatora(close,open))) > 0;

The above will access daily values for indicatora. When that indicator is 1.. the logic will buy/sell.

Please confirm.

Questions remaining:

Also any idea why this works in c#:
VectorD a = TA.Ref(open,0) < TA.Ref(close,1);
parameters:
open=open
close=close

but this does not work:
VectorD a = TA.HistoPrice(_open,0) < TA.HistoPrice(_close,1);
parameters:
_open=_open
_close=_close

Read more: http://www.quantshare.com/index.php?option=thread&tid=605&screen=1#ixzz2LIxSZZR6
Follow us: @quantshare on Twitter

AND

1) settings for the indicator= so when I created this indicator I had used TA.Ref(open,0) and TA.Ref(close,1) in the logic. The "open" and "close" variables were added using the parameter at the bottom:

open=number=open
close=number=close

Like, I said this works beauty when I added it to my chart (the values are correct). But what I don't understand is when I add this indicator on backtesting screen.. it looks like this:

indicatora(open,close)

The "open" and "close" values that show up..by default are they open=0 and close=1 (as I had it in my indicator)[above^]??

What happens if I change it to:
indicatora(0,10) ??

Read more: http://www.quantshare.com/index.php?option=thread&tid=605&screen=1#ixzz2LIxZCLmK
Follow us: @quantshare on Twitter


thx



QuantShare
2013-02-19 19:24:08

  0

The "Ref" and "HistoPrice" functions are totally different.

"Ref" references a previous bar. Not matter what time frame you are using.
"HistoPrice" is used with intraday data to reference previous DAILY bars (The daily bars are recreated internally from intraday data).

Regarding the second question, you should add parameters with different names. Try "open1" instead of the internal variable "open" that already exists.



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