feat: add BOLL (Bollinger Bands) indicator to Strategy Studio

- Add BOLL to frontend indicator grid with period selection
- Add BOLL calculation (upper/middle/lower bands) in market data
- Add BOLL fields to TimeframeSeriesData struct
- Integrate BOLL into AI decision engine prompts
- Support multi-timeframe BOLL analysis

decision/engine.go

@@ -868,6 +868,14 @@ func (e *StrategyEngine) writeAvailableIndicators(sb *strings.Builder) {
 		sb.WriteString("\n")
 	}
 
+	if indicators.EnableBOLL {
+		sb.WriteString("- Bollinger Bands (BOLL) - Upper/Middle/Lower bands")
+		if len(indicators.BOLLPeriods) > 0 {
+			sb.WriteString(fmt.Sprintf(" (periods: %v)", indicators.BOLLPeriods))
+		}
+		sb.WriteString("\n")
+	}
+
 	if indicators.EnableVolume {
 		sb.WriteString("- Volume data\n")
 	}
@@ -1193,6 +1201,12 @@ func (e *StrategyEngine) formatTimeframeSeriesData(sb *strings.Builder, data *ma
 		sb.WriteString(fmt.Sprintf("ATR14: %.4f\n", data.ATR14))
 	}
 
+	if indicators.EnableBOLL && len(data.BOLLUpper) > 0 {
+		sb.WriteString(fmt.Sprintf("BOLL Upper: %s\n", formatFloatSlice(data.BOLLUpper)))
+		sb.WriteString(fmt.Sprintf("BOLL Middle: %s\n", formatFloatSlice(data.BOLLMiddle)))
+		sb.WriteString(fmt.Sprintf("BOLL Lower: %s\n", formatFloatSlice(data.BOLLLower)))
+	}
+
 	sb.WriteString("\n")
 }
 

market/data.go

@@ -227,6 +227,9 @@ func calculateTimeframeSeries(klines []Kline, timeframe string, count int) *Time
 		RSI7Values:  make([]float64, 0, count),
 		RSI14Values: make([]float64, 0, count),
 		Volume:      make([]float64, 0, count),
+		BOLLUpper:   make([]float64, 0, count),
+		BOLLMiddle:  make([]float64, 0, count),
+		BOLLLower:   make([]float64, 0, count),
 	}
 
 	// Get latest N data points based on count from config
@@ -277,6 +280,14 @@ func calculateTimeframeSeries(klines []Kline, timeframe string, count int) *Time
 			rsi14 := calculateRSI(klines[:i+1], 14)
 			data.RSI14Values = append(data.RSI14Values, rsi14)
 		}
+
+		// Calculate Bollinger Bands (period 20, std dev multiplier 2)
+		if i >= 19 {
+			upper, middle, lower := calculateBOLL(klines[:i+1], 20, 2.0)
+			data.BOLLUpper = append(data.BOLLUpper, upper)
+			data.BOLLMiddle = append(data.BOLLMiddle, middle)
+			data.BOLLLower = append(data.BOLLLower, lower)
+		}
 	}
 
 	// Calculate ATR14
@@ -466,6 +477,36 @@ func calculateATR(klines []Kline, period int) float64 {
 	return atr
 }
 
+// calculateBOLL calculates Bollinger Bands (upper, middle, lower)
+// period: typically 20, multiplier: typically 2
+func calculateBOLL(klines []Kline, period int, multiplier float64) (upper, middle, lower float64) {
+	if len(klines) < period {
+		return 0, 0, 0
+	}
+
+	// Calculate SMA (middle band)
+	sum := 0.0
+	for i := len(klines) - period; i < len(klines); i++ {
+		sum += klines[i].Close
+	}
+	sma := sum / float64(period)
+
+	// Calculate standard deviation
+	variance := 0.0
+	for i := len(klines) - period; i < len(klines); i++ {
+		diff := klines[i].Close - sma
+		variance += diff * diff
+	}
+	stdDev := math.Sqrt(variance / float64(period))
+
+	// Calculate bands
+	middle = sma
+	upper = sma + multiplier*stdDev
+	lower = sma - multiplier*stdDev
+
+	return upper, middle, lower
+}
+
 // calculateIntradaySeries calculates intraday series data
 func calculateIntradaySeries(klines []Kline) *IntradayData {
 	data := &IntradayData{

market/types.go

@@ -41,6 +41,10 @@ type TimeframeSeriesData struct {
 	RSI14Values []float64  `json:"rsi14_values"` // RSI14 series
 	Volume      []float64  `json:"volume"`       // Volume series (deprecated, use Klines)
 	ATR14       float64    `json:"atr14"`        // ATR14
+	// Bollinger Bands (period 20, std dev multiplier 2)
+	BOLLUpper  []float64 `json:"boll_upper"`  // Upper band
+	BOLLMiddle []float64 `json:"boll_middle"` // Middle band (SMA)
+	BOLLLower  []float64 `json:"boll_lower"`  // Lower band
 }
 
 // OIData Open Interest data

store/strategy.go

@@ -82,6 +82,7 @@ type IndicatorConfig struct {
 	EnableMACD        bool `json:"enable_macd"`
 	EnableRSI         bool `json:"enable_rsi"`
 	EnableATR         bool `json:"enable_atr"`
+	EnableBOLL        bool `json:"enable_boll"`         // Bollinger Bands
 	EnableVolume      bool `json:"enable_volume"`
 	EnableOI          bool `json:"enable_oi"`           // open interest
 	EnableFundingRate bool `json:"enable_funding_rate"` // funding rate
@@ -91,6 +92,8 @@ type IndicatorConfig struct {
 	RSIPeriods []int `json:"rsi_periods,omitempty"` // default [7, 14]
 	// ATR period configuration
 	ATRPeriods []int `json:"atr_periods,omitempty"` // default [14]
+	// BOLL period configuration (period, standard deviation multiplier is fixed at 2)
+	BOLLPeriods []int `json:"boll_periods,omitempty"` // default [20] - can select multiple timeframes
 	// external data sources
 	ExternalDataSources []ExternalDataSource `json:"external_data_sources,omitempty"`
 	// quantitative data sources (capital flow, position changes, price changes)
@@ -241,12 +244,14 @@ func GetDefaultStrategyConfig(lang string) StrategyConfig {
 			EnableMACD:        false,
 			EnableRSI:         false,
 			EnableATR:         false,
+			EnableBOLL:        false,
 			EnableVolume:      true,
 			EnableOI:          true,
 			EnableFundingRate: true,
 			EMAPeriods:        []int{20, 50},
 			RSIPeriods:        []int{7, 14},
 			ATRPeriods:        []int{14},
+			BOLLPeriods:       []int{20},
 			EnableQuantData:    true,
 			QuantDataAPIURL:    "http://nofxaios.com:30006/api/coin/{symbol}?include=netflow,oi,price&auth=cm_568c67eae410d912c54c",
 			EnableQuantOI:      true,

web/src/components/strategy/IndicatorEditor.tsx

@@ -72,6 +72,8 @@ export function IndicatorEditor({
       rsiDesc: { zh: '相对强弱指标', en: 'Relative Strength Index' },
       atr: { zh: 'ATR', en: 'ATR' },
       atrDesc: { zh: '真实波幅均值', en: 'Average True Range' },
+      boll: { zh: 'BOLL 布林带', en: 'Bollinger Bands' },
+      bollDesc: { zh: '布林带指标（上中下轨）', en: 'Upper/Middle/Lower Bands' },
       volume: { zh: '成交量', en: 'Volume' },
       volumeDesc: { zh: '交易量分析', en: 'Trading volume analysis' },
       oi: { zh: '持仓量', en: 'Open Interest' },
@@ -295,6 +297,7 @@ export function IndicatorEditor({
               { key: 'enable_macd', label: 'macd', desc: 'macdDesc', color: '#a855f7' },
               { key: 'enable_rsi', label: 'rsi', desc: 'rsiDesc', color: '#F6465D', periodKey: 'rsi_periods', defaultPeriods: '7,14' },
               { key: 'enable_atr', label: 'atr', desc: 'atrDesc', color: '#60a5fa', periodKey: 'atr_periods', defaultPeriods: '14' },
+              { key: 'enable_boll', label: 'boll', desc: 'bollDesc', color: '#ec4899', periodKey: 'boll_periods', defaultPeriods: '20' },
             ].map(({ key, label, desc, color, periodKey, defaultPeriods }) => (
               <div
                 key={key}

web/src/types.ts

@@ -467,12 +467,14 @@ export interface IndicatorConfig {
   enable_macd: boolean;
   enable_rsi: boolean;
   enable_atr: boolean;
+  enable_boll: boolean;
   enable_volume: boolean;
   enable_oi: boolean;
   enable_funding_rate: boolean;
   ema_periods?: number[];
   rsi_periods?: number[];
   atr_periods?: number[];
+  boll_periods?: number[];
   external_data_sources?: ExternalDataSource[];
   // 量化数据源（资金流向、持仓变化、价格变化）
   enable_quant_data?: boolean;