Hi TZ or Anyone

i saw from this link : http://www.amibroker.com/kb/category/charting/indicators/

Would you please advise me , what is the FutureHHV / LLV value?

how to calculate this futureHHV/LLV.

Thanks in advance

SDevan

Hi TZ or Anyone

i saw from this link : http://www.amibroker.com/kb/category/charting/indicators/

Would you please advise me , what is the FutureHHV / LLV value?

how to calculate this futureHHV/LLV.

Thanks in advance

SDevan

It is available using the **Ref** function, read this carefully

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hi portfoliobuilder ,

thanks for the reply , do you have any idea the parameter of future ref ?

i using the ref function see the below code , i couldnt get the exact parameter as TJ made.

rngH = HHV(H,20);

rngrefhigh = Ref(rngH,-20);

Plot( rngrefhigh, “HHV”, colorGold, styleThick );

rngL = LLV(L,20);

rngrefLow = Ref(rngL,-20);

Plot( rngrefLow, “HHV”, colorGold, styleThick );

if you able to get the value of ref ,please let me know mate.

thanks

I am not certain what you are having a problem with as the code in the knowledge base example works fine.

Perhaps it is a bit confusing because one function uses **Positive** numbers to refer to *previous* bars, and the other function uses **Negative** numbers to refer to *previous* bars and **Positive** numbers to look into the *future*

So carefully read the appropriate User Guide sections.

https://www.amibroker.com/guide/afl/hhv.html

""**hhv**( high, **8**)" returns the highest high price over the *preceding* eight periods."

https://www.amibroker.com/guide/afl/ref.html

"The formula "**ref**( C, **12** )" returns the closing price 12 periods ahead (this means looking up the *future*)" . If I wanted to use **Ref** to look into the past then I would use a **negative** number, Ref(C, -12) would look for the Close 12 bars in the *past*.

So in the Knowledge Base Example you were looking at, run an Exploration to illustrate what these calculations are creating.

```
Filter=1;
AddColumn(High, "High");
AddColumn(Ref(HHV( H, 20 ), 20), "Highest in Future 20 bars");
AddColumn(HHV( H, 20 ), "Highest in Past 20 bars");
```

This will produce an output like below where I have shown 20 days worth of "High" and in column 3 on the first bar you look into the future and find that 207.14 will be the Highest High. The next column looks backwards into the past.

3 Likes

hi portfoliobuilder

thanks for you explanation , finally i got the formula.

thanks

A small question here . Suppose I have stock with 100 days of listing data . Now supose i use the hhv(high,20 ) and the ref ( hhv( high,20) , 20) functions

- how many data items will hhv( high,20 ) have ? Will it be 100 or 80 ? If , 80 , then what will be the values of remaining 20 ?
- How many data items will ref ( hhv(high,20),20) have ? 100 , 80 ? If, 80, then what will be the remaining 20 values ?
- what is the practical use of ref ( hhv(high,20),20 ) function. For example , at day 100 of the above mentioned stock, what information does this fucntion convey ?

I can do you a good favour by answering the three questions,

But i can do you a **great** service directing you here.

Kindly check it out

https://www.amibroker.com/guide/h_debugger.html

And

https://www.amibroker.com/guide/afl/_tracef.html

2 Likes

@saurabhk, Like @travick suggested, it is best if you actually go and LEARN what it means.

Personally I would suggest you use an Exploration, with columns for the various items of data that you would be looking at, and see the data like portfoliobuilder did above.

2 Likes

Thanks a lot fr the replies of @travick and ur self too . I got the first 2 points clear. The ref function shifts the array by the number of periods. But what is the usefulless of such shifts ?

Ok , understood the concept of ref . Now as @travick sent a link about debugger; Would you explain how can we use it in our case . My watch window shows nothing

Thanks a lot pushing me to crunch the code and understand it myself . Here is the code that I explored

1 Like