Method BuildUserPrompt

kernel/engine_prompt.go:719–896

============================================================================ Prompt Building - User Prompt ============================================================================ BuildUserPrompt builds User Prompt based on strategy configuration

(ctx *Context)

// BuildUserPrompt builds User Prompt based on strategy configuration
func (e *StrategyEngine) BuildUserPrompt(ctx *Context) string {
	var sb strings.Builder

	// System status
	sb.WriteString(fmt.Sprintf("Time: %s | Period: #%d | Runtime: %d minutes\n\n",
		ctx.CurrentTime, ctx.CallCount, ctx.RuntimeMinutes))

	// BTC market
	if btcData, hasBTC := ctx.MarketDataMap["BTCUSDT"]; hasBTC {
		sb.WriteString(fmt.Sprintf("BTC: %.2f (1h: %+.2f%%, 4h: %+.2f%%) | MACD: %.4f | RSI: %.2f\n\n",
			btcData.CurrentPrice, btcData.PriceChange1h, btcData.PriceChange4h,
			btcData.CurrentMACD, btcData.CurrentRSI7))
	}

	// Account information
	sb.WriteString(fmt.Sprintf("Account: Equity %.2f | Balance %.2f (%.1f%%) | PnL %+.2f%% | Margin %.1f%% | Positions %d\n\n",
		ctx.Account.TotalEquity,
		ctx.Account.AvailableBalance,
		(ctx.Account.AvailableBalance/ctx.Account.TotalEquity)*100,
		ctx.Account.TotalPnLPct,
		ctx.Account.MarginUsedPct,
		ctx.Account.PositionCount))

	// Recently completed orders (placed before positions to ensure visibility)
	if len(ctx.RecentOrders) > 0 {
		sb.WriteString("## Recent Completed Trades\n")
		for i, order := range ctx.RecentOrders {
			resultStr := "Profit"
			if order.RealizedPnL < 0 {
				resultStr = "Loss"
			}
			sb.WriteString(fmt.Sprintf("%d. %s %s | Entry %.4f Exit %.4f | %s: %+.2f USDT (%+.2f%%) | %s→%s (%s)\n",
				i+1, order.Symbol, order.Side,
				order.EntryPrice, order.ExitPrice,
				resultStr, order.RealizedPnL, order.PnLPct,
				order.EntryTime, order.ExitTime, order.HoldDuration))
		}
		sb.WriteString("\n")
	}

	// Historical trading statistics (helps AI understand past performance)
	if ctx.TradingStats != nil && ctx.TradingStats.TotalTrades > 0 {
		// Get language from strategy config
		lang := e.GetLanguage()

		// Win/Loss ratio
		var winLossRatio float64
		if ctx.TradingStats.AvgLoss > 0 {
			winLossRatio = ctx.TradingStats.AvgWin / ctx.TradingStats.AvgLoss
		}

		if lang == LangChinese {
			sb.WriteString("## Historical Trading Statistics\n")
			sb.WriteString(fmt.Sprintf("Total Trades: %d | Profit Factor: %.2f | Sharpe: %.2f | Win/Loss Ratio: %.2f\n",
				ctx.TradingStats.TotalTrades,
				ctx.TradingStats.ProfitFactor,
				ctx.TradingStats.SharpeRatio,
				winLossRatio))