Signal data for PNL table. Represents a single closed signal with essential trading information.
strategyName: string
Strategy that generated this signal
signalId: string
Unique signal identifier
symbol: string
Trading pair symbol
position: string
Position type (long/short)
pnl: number
PNL as percentage
closeReason: string
Reason why signal was closed
openTime: number
Timestamp when signal opened
closeTime: number
Timestamp when signal closed