Calculating total ROI when trading BTC for fiat

[monsterer]

Hi guys,

I'm trying to work out if its possible to calculate a meaningful, single ROI percentage when you've been trading fiat currency for BTCs - the problem comes when you have both BTCs and fiat left over at the point you want to calculate ROI.

Is it possible to get a single meaningful number out, rather than 2 percentages?

Cheers, Paul.

[Snipes777]

Yes, you just have to decide what your ruler is to convert things to. USD, BTC, Other? Then you can do some goal seek operations in excel or something to get what you are looking for.

[Bendur]

Most people would probably use USD to work out their profits, just because we are all fairly used to working with it. That's what I generally use anyway.

[CountSparkle]

How are you calculating it now?

[monsterer]

How are you calculating it now?

I take the starting value of BTC->USD exchange rate, convert my remaining BTCs into USDs and then do the regular ROI calculation.

startUsdValue = startBtcs*exchangeRate + startUsds

currentUsdValue = currentBtcs*exchangeRate + currentUsds

ROI = 100*(currentUsdValue - startUsdValue) / startUsdValue

But, it seems wrong somehow - just wanted to make sure there wasn't another more correct way?