giải thích về profit RT trade

At 2018/03/25 14:49:44 Gunbot says: BUYING BTC-FCT at poloniex- Rate: 0.00272507 - Amount: 73.39261009808922
BTC balance: 9.72318499
FCT balance: 0
Check this trade chart here https://www.tradingview.com/chart/?symbol=poloniex:FCTBTC
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At 2018/03/25 15:00:29 Gunbot says: REVERSAL TRADING: BUYING FCT-BTC at poloniex- Rate: 0.00271862 - Amount: 73.39233313
BTC balance: 9.44623017
FCT balance: 73.39233313
Check this trade chart here https://www.tradingview.com/chart/?symbol=poloniex:FCTBTC
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At 2018/03/25 15:32:05 Gunbot says: REVERSAL TRADING: SELLING FCT-BTC at poloniex- Rate: 0.00266312 - Amount: 74.92184531447347
BTC balance: 9.64324961
FCT balance: 0.00058464
Check this trade chart here https://www.tradingview.com/chart/?symbol=poloniex:FCTBTC
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At 2018/03/26 02:48:52
Gunbot says: SELLING BTC-FCT at poloniex Rate: 0.00300898 - Amount: 74.92138023
Averaged bought price was: 0.0027961378463954934
P/L for this trade is: 7.074%.
(This is about 119.00 USD)
BTC balance: 9.38253201
FCT balance: 74.92138023
Check this trade chart here https://www.tradingview.com/chart/?symbol=poloniex:FCTBTC
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Profit: +0,02543768944BTC
and never used more base
BUY 0,00272507*73,39233313= -0,1999992452
RT_SELL 0,00271862*73,39233313= +0,1995258647
RT_BUY 0,00266312*74,92184531= -0,1995258647
FINAL SELL 0,00300898*74,92138023= +0,2254369347