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lookup the first correct value within a date range.

Posted on 2014-04-28
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Last Modified: 2014-05-01
I need a lookup formula to find the price of a commodity that occurs within a date range.
(preferrably a non-array{} formula please)

Here is my example (see attached image)

Column A contains the date & time stamp, & column B is the price of commodity' Y' at that time.  

Cell  D1 contains my customer's target price order for commodity 'Y'.  
Cell D2 contains the time the target order was placed.

I want a vookup formula that will tell me if the customers target order (D1) was achieved
any time after he placed the order (D2) until the current time (i.e. =now()).

Note: the data in Column A will be sorted in accending order, & I just want to find the first instance of a positive result.

So in this example, the target was achieved at 4/20/14 7:00:00 pm (ROW 10)  when the commodity price in column B exceeded his target price of $149.50.  The formula will return a result of $150.00 (cell B10).  Note, in this example the formula will ignore the $150.00 vaule in ROW2 becasue it occurred before he placed the target order.

thanks.
table.jpg
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Question by:jtencha
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6 Comments
 
LVL 21

Accepted Solution

by:
Ejgil Hedegaard earned 300 total points
ID: 40028263
Time, column A
=INDEX($A$2:$A$12,MATCH(1,INDEX(($A$2:$A$12>=$D$2)*($B$2:$B$12>$D$1),,),0),1)

Value, column B
=INDEX($B$2:$B$12,MATCH(1,INDEX(($A$2:$A$12>=$D$2)*($B$2:$B$12>$D$1),,),0),1)
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LVL 29

Expert Comment

by:gowflow
ID: 40029206
I made a sample workbook where in Cell D3 you have this formula
=IFERROR(INDEX($A$2:$A$100,MATCH(1,INDEX(($A$2:$A$100>=$D$2)*($B$2:$B$100>$E$2),,),0),1),"Not Found")

and in Cell E3 you have this one
=IFERROR(VLOOKUP(D3,$A$2:$B$100,2),"Not Found")

Basically D3 will lookup the first occurrence of the date/time put in D2 where the value is greater than the value put in E2

You can change the 100 in the formula to suits for your maximum data.
Rgds/gowflow
TimePrice.xlsx
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Author Comment

by:jtencha
ID: 40033272
sorry, was away.  I'll play with these formulas and post back tomorrow how they worked. thanks
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Author Closing Comment

by:jtencha
ID: 40035520
hgholt, it worked like a charm.  By the way, what does the "(1" in this part of the formula, ...,MATCH(1,.... do?  I havent used this in an index/match before.

Thanks for the input also TimePrice.
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LVL 21

Expert Comment

by:Ejgil Hedegaard
ID: 40035817
Index(Range,Row,Column) returns a single value.
When Row or Column is not used, an array of the whole range is returned.
So INDEX(($A$2:$A$12>=$D$2)*($B$2:$B$12>$D$1),,) makes an array of 0 and 1.
0 when ($A$2:$A$12>=$D$2)*($B$2:$B$12>$D$1) is false, and 1 when true.

Then MATCH(1,...) finds the position of the first true value (=1) in the array.

To see how it works:
In the formula edit line, highlight INDEX(($A$2:$A$12>=$D$2)*($B$2:$B$12>$D$1),,) and press F9 to evaluate. Then Esc to get back.
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Author Comment

by:jtencha
ID: 40036132
Thanks!
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