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AlistairH
Newbie
Joined: 10 Mar 2011
Posts: 2
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 Posted: Thu Mar 10, 2011 2:37 am Post subject: Calculate The Biggest Drop In A Column Of Numbers |
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Does anyone know if there is an inbuilt function to do the following or do I need to write a macro?
I'm tracking the running total of my stocks and shares which, if plotted on a graph, goes up and down. I want to quickly calculate the biggest fall from the previous high point. For example, if I have a column of numbers like so...
1
2
3
4
5
6 << current high point
5
4
3
4
5
4
3
2 << current low point
3
4
5
6
7 << new high point
The result would be 4, even though there was a minor recovery in-between, it didn't reach the previous high point.
So the function will analyse the whole column of data, look at the drops from each high point as it finds them and ultimately returns the biggest it found in the whole range.
Though not necessarily a requirement just now, I envisage it being useful for the function to return where in the column that that drop occurred.
Thanks in advance |
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Villeroy
Super User
Joined: 04 Oct 2004
Posts: 10065
Location: Germany
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Robert Tucker
Moderator
Joined: 16 Aug 2004
Posts: 3367
Location: Manchester UK
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| Posted: Thu Mar 10, 2011 4:44 am Post subject: |
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in B2 and filled down. Then:
| Code: | | =1+MATCH(MAX($B$2:B19);$B$2:B19;0) |
Not sure it does all you want it to, but perhaps it's a start.
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AlistairH
Newbie
Joined: 10 Mar 2011
Posts: 2
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| Posted: Fri Mar 11, 2011 3:11 am Post subject: |
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| Nice bit of lateral thinking there Robert. Thanks |
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