# How do I calculate a hypothetical trade? [closed]

Say I had 1 Bitcoin at the start of the trade yesterday

`````` @ 01-27 14:29
``````

and the price was

`````` USD : 263.95872470902
``````

So, I sold the whole Bitcoin at the average price

Then

`````` @ 01-29 10:57
``````

I bought back as much Bitcoin as the new price would let me again at the average price of

`````` USD : 233.55771464647
``````

The price data was taken from crypto-prices.com I just don't see how that could be worked out. I know how to use preev.com to calculate the 'current' value but I don't understand how I would calculate a previous value and work out the difference / or would be, pretend profit.

## closed as off-topic by Murch♦Jan 29 '15 at 22:51

• This question does not appear to be about Bitcoin within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• I'm voting to close this question as off-topic because this question is essentially about elementary math and as such not a good fit for a Bitcoin experts' question and answer site. – Murch Jan 29 '15 at 22:51

`263.95 [USD/BTC] / 233.56 [USD/BTC] * 1 [BTC] = 1.13 [BTC]`, i.e. for each BTC you sold at the higher price, you can rebuy 1.13 BTC at the lower price.