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# ask-questions
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prehistoric-king-13950

02/19/2024, 11:39 AM
Hi friends, I’m working with a conversion metric that can be a negative or positive integer, but Growth Book seems to struggle to show any data on this as the metric is a mostly negative figure? The metric type in GB is a sum of revenue per user type, I’ve called it ‘Sum of Gain/Loss Per User’. Effectively the metric shows if a transaction is a cost, breaks even, or is profitable, I’m defining this as profit per transaction minus operational cost of the transaction. No matter how I change the metrics behaviour it never shown any data within the experiment, I only see the message in the screenshots attached. This experiment has had 17,000 clients, with 4250 per variant and the other metrics show data fine. Am I using the wrong metric type? Or doing something else obviously wrong?
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fresh-football-47124

02/19/2024, 4:17 PM
you should not set a negative min sample size
that doesn't make much sense - set it to 0 if you want to always show the stats
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prehistoric-king-13950

02/19/2024, 4:21 PM
Hey graham, thanks for the response. That’s from when I was setting it lower and lower to try and get anything to show. I’ve just set it to 0 and get the same results.
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fresh-football-47124

02/19/2024, 4:22 PM
that does look strange
I can ask someone from our data team to take a look - but they have today off
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prehistoric-king-13950

02/19/2024, 4:23 PM
That would be amazing. No stress. matt@collctiv.com is me.
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fresh-football-47124

02/19/2024, 4:23 PM
What kind of metric is this?
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prehistoric-king-13950

02/19/2024, 4:23 PM
It’s revenue
Screenshot 2024-02-19 at 16.23.44.png
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fresh-football-47124

02/19/2024, 4:24 PM
ah, mixpanel
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prehistoric-king-13950

02/19/2024, 4:24 PM
I do get values back in the data preview
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fresh-football-47124

02/19/2024, 4:24 PM
ok
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prehistoric-king-13950

02/20/2024, 2:04 PM
@fresh-football-47124 thanks for your input yesterday. I ended up creating a ratio of profit over loss rather than a subtraction as a work around so that the figures are always positive. The results are the sum of those ratio values per variant to show the impact. Just curious if you know if negative values have proven to be troublesome elsewhere when used as revenue metrics?
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