Accumulated gain/loss of the strategy in absolute value and a percentage, nominated in USDT

Total performance (USDT) shows a gain/loss of the strategy from the initial capital nominated in USDT and a percentage of the difference between initial capital (USDT) and strategy balance (USDT).

**Example:**

Let's have a Single Market Strategy, operating on LTC/BTC asset pairing, that started with initial capital of 10 BTC and over time it earn another 2 BTC, leaving the strategy with 12 BTC strategy balance at this moment.

If the exchange rate BTC/USDT at the moment of deployment was 1 BTC / 1,000 USDT the value of initial capital nominated in USDT would be 10,000 USDT.

If the exchange rate BTC/USDT at this moment is 1 BTC / 2,000 USDT, the value of strategy balance of 12 BTC nominated in USDT is 24,000 USDT.

In this case the total performance in USDT would be 14,000 USDT and +240%.