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Hi,
is there any way to gain access to the index (k=1,....,periods) within the summation function to run calculations like sum(C*k, periods) ?
Have been searching in various places and hope I don't bother the forum too much with this question.
Thanks!
Reinhard
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Wienke,
I might not have understood your request, I'm having some reading problems lately :D
Try this :
sum(C*cum(1), periods)
Patrick :mrgreen:
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Rank: Newbie
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Patrick,
thanks a lot and sorry the question had not been clear and explained in better way.
What I would need to do is to perform a calculation possibly using sum() that actually uses the index (=number) of the added elements.
E.g. A weighted summation over 3 periods (k=1,2,3) -> sum(k/periods * C, periods). In effect it should calculate the following: 1/3 * C + 2/3 * C + 3/3 * C for each value of the custom indicator.
Have not figured out how to use cum(1) in this context as cum(1) will give me the n-th index order from the start of the chart. I would need the index values (1,2,3) as abovefrom the start of the summation.
Hope this may help to clarify my question. Thank you.
Reinhard Wienke
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Rank: Advanced Member
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Reinhard, try this MS code:
[code:1:69b9c5846e]
================
Summation Index
================
---8<-----------------------
{ Summation index, aka % Exponential Moving Avg}
{ ©Copyright 2005 Jose Silva }
{ For personal use only }
{ josesilva22@yahoo.com }
{ User Inputs }
wght:=Input("Weighting 0~100%",
0,100,66.666667)/100;
x:=Input("use Open=1 High=2 Low=3 Close=4 WClose=5 MP=6",1,6,4);
{ Select price field }
x:=If(x=1,O,If(x=2,H,If(x=3,L,If(x=5,WC(),If(x=6,MP(),C)))));
{ Exponential %-weighted Moving Average }
Ema:=x*wght+PREV*(1-wght);
{ Plot on price chart }
Ema
---8<-----------------------
[/code:1:69b9c5846e]
jose '-)
http://www.metastocktools.com
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