I've been involved in crypto for a while, and one thing I've noticed is that many new traders don't quite understand how to calculate their gains and losses. If you come from traditional finance, the concept is similar, but in the crypto world, there are its own nuances that are worth mastering.

Basically, crypto P&L reflects whether you're making or losing money on your positions. But here’s where it gets interesting: it’s not as simple as just subtracting what you spent from what you have now. There are several concepts you need to understand first.

First is MTM, which is valuing your asset at the current market price. If you hold Bitcoin and the price goes up, your position increases in value. That’s MTM. Then we have realized P&L, which is what you gain or lose when you close the trade. And unrealized P&L, which is the profit or loss on open positions that you haven't yet realized.

Let me give you a simple example. Imagine you bought Ethereum at $1,950 and today it’s at $1,970. Your P&L would be $20 in gains. But if it had dropped to $1,940, you’d be at a loss. This is the basics of crypto P&L.

Now, when you close a position, the realized P&L is confirmed. If you bought Polkadot at $70 and sold it at $105, you made $35 on that trade. That’s your realized P&L. But if you still hold the position and it’s only risen to $90, you have $20 of unrealized P&L, which can change tomorrow.

There are several methods to calculate this. The FIFO method assumes you sell the earliest purchased assets first. If you bought 1 ETH at $1,100 and another at $800, and sell one at $1,200, FIFO uses the $1,100 price as the basis, giving you a $100 profit. With LIFO, which assumes last-in, first-out, you’d use the $800 as the basis, resulting in a $400 profit.

There’s also the weighted average cost method, which is more realistic for most. Here, you average all your entry costs. If you bought 1 BTC at $1,500 and another at $2,000, your average cost is $1,750. If you sell at $2,400, your profit is $650.

One thing many overlook is the year-to-date calculation, or YTD. If you started 2026 with $1,000 in ADA and now have $1,600, you have $600 in unrealized gains. It’s a good way to see how your portfolio is performing over time.

For those trading perpetual contracts, you need to calculate both realized and unrealized P&L and add them together. These contracts have no expiration date, so you can hold them indefinitely if you have enough margin.

The important thing is to understand that crypto P&L isn’t just a number. It’s the metric that tells you whether your strategy is working or not. Some traders use spreadsheets, others automated tools. What matters is that you have clarity about your numbers.

Personally, I believe that mastering these concepts is what separates traders who last from those who burn out quickly. It’s not just about making trades; it’s about understanding exactly what you’re earning or losing with each move.