Sampey, when I trade BTC/USD and I want to sell BTC high (PING) and rebuy it back low (PONG), then my win is in BTC, e.g. I sell 1BTC for 1000 and when it falls I rebuy 2BTC at 500, therefore my gain would be 1BTC.
However, the "cumulative gain" shows the result in USD instead of BTC.
If you talk exactly about BTC/USD or USD/BTC markets, in almost all cases this means that actual market is
USD/BTC on crypto exchange.
Which means you are trading with assets called BTC by using currency USD. This information CAT grabs from the exchange directly on API level.
In the crypto exchanges, some misspelling, and some incorrect information present. But mostly all of them mean that you trade and get profit in USD.
For example, bitstamp on all titles show BTC/USD, but in fact on tradeview, on API level, etc it's act like a USD/BTC.
I think in this case we could only ask Sampey to make a preference option, where the market pair could be swapped and calculated depending on user request. For example, if user want USD/BTC - everything is calculating with USD gain, with 'swap' enabled option CAT would start with BTC gain calculation.
Technically it's a depend on CAT's implementation: it would be hard or easy do this.
But my expectation that CAT is not ready for this feature and Sampey will deny such request.