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Catch first nonzero value - Catch first nonzero value
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Michael  
#1 Posted : Friday, March 23, 2007 8:17:59 AM(UTC)
Michael

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Location: Nizhny Novgorod, Russia

Hello everyone,

I’m trying to figure out how to make an indicator that keeps its own first nonzero value. Let’s view this indicator (as an example)

Mod(CLOSE*1000,3)

During a bar period it can return 0, 1 or 2. Let it takes on values 0, 0, 1, 2, 0 (in order). I want to get 1 since it is first nonzero value in series for a given bar. How I can do it?

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*PP  
#2 Posted : Friday, March 23, 2007 11:38:14 AM(UTC)
*PP

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i am not sure that i understod what u want but if i understod corectly then here it is:

a:=Mod(C*1000,3);
If(Ref(If( BarsSince(a=1)<BarsSince( a=0),1,0),-1)=0 AND If( BarsSince(a=1)<BarsSince( a=0),1,0)=1,1,0)
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*PP  
#3 Posted : Friday, March 23, 2007 11:44:02 AM(UTC)
*PP

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i forgot to mention that the formula above will plot only the first 1 after a zero period. 0,0,1,2,1,0,2,1,1 will return 0,0,1,0,0,0,0,1,0
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Michael  
#4 Posted : Friday, March 23, 2007 12:57:41 PM(UTC)
Michael

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Location: Nizhny Novgorod, Russia

Actually I’ve asked about another thing. I receive real time data, and every time when the price is updated the indicator is updated too. Let periodicity of chart is 5 minute and now 10:00 AM. New bar is started to draw. In 10:01 new piece of data comes and indicator is re-counting again. Its first value for a new bar becomes 0. In a minute its value updated again and become 1 and so on. Thus we have the following changes of indicator (for example):

***period starts 10:01***

10:01 value 0

10:02 value 1

10:03 value 2

10:04 value 1

10:05 value 0

***period ends

At the end of 5 minute period we have a 0 value, but I want to get 1 as it is first nonzero value within period. Is it possible to implement?
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crash59  
#5 Posted : Friday, March 23, 2007 1:34:09 PM(UTC)
crash59

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The PREV function cannot be used as it requires 2 bars minimum.

This is one approach to your problem.


---------------------------------------------------------------------

a0:=Mod(C*1000,3) ;
a1:=ValueWhen(1,Cum(1)=1,a0);
a2:=ValueWhen(1,Cum(1)=2,a0);
a3:=ValueWhen(1,Cum(1)=3,a0);
a4:=ValueWhen(1,Cum(1)=4,a0);
a5:=ValueWhen(1,Cum(1)=5,a0);
a6:=ValueWhen(1,Cum(1)=6,a0);
a7:=ValueWhen(1,Cum(1)=7,a0);
a8:=ValueWhen(1,Cum(1)=8,a0);
a9:=ValueWhen(1,Cum(1)=9,a0);
a10:=
If(a1>0,a1,
If(a2>0,a2,
If(a3>0,a3,
If(a4>0,a4,
If(a5>0,a5,
If(a6>0,a6,
If(a7>0,a7,
If(a8>0,a8,
If(a9>0,a9,0)))))))));
a0;a10;

---------------------------------------------------------------------
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*PP  
#6 Posted : Saturday, March 24, 2007 1:14:19 AM(UTC)
*PP

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Posts: 135
Location: Romania

Michael,

if u don`t say exactly what u want i can`t help - i don`t even have real time data because i use only EOD. If there is something linked with the minute in wich is happening u should try to combine the minute() function. For example if(frac(minute()/5)=0,1,mod(minute(),5)) the result will be 1 when the minute is 5 or any multiple of 5 and 1,2,3,4 the rest of time.
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uasish  
#7 Posted : Saturday, March 24, 2007 11:21:38 AM(UTC)
uasish

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Thanks: 7 times

*pp,

Thks,now the 2nd/3rd retracement of price/indicator can be coded ,i tried a crude repeated valuewhen method.

Asish
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wabbit  
#8 Posted : Monday, March 26, 2007 10:25:02 AM(UTC)
wabbit

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Was thanked: 16 time(s) in 16 post(s)
Michael,

Try this as a solution to your problem. I haven't tested it because it's late and I am tired but cannot sleep, so let me know if it works, and if it doesn't work, let me know what happens!

Code:

data:={whatever indicator};

start:=mod(minute(),5)=0;
start:=start and alert(start=0,2);

count:=data<>0;
count:=cum(count);

tr:=(count-valuewhen(1,start,count))=1;
tr:=tr and alert(tr=0,2);

i:=cum(isdefined(tr+start))=1;
myValue:=(barssince(tr or i)<barssince(start or i))*valuewhen(1,tr,data);

{plot}
myValue;


Astute Forum members will recognize the similarities in code between this thread and another recent thread, showing the usefulness of this coding technique.


Hope this helps.

wabbit [:D]
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