diff --git a/formula/max.go b/formula/max.go
index 2ce13743619f571633f9bb41364d6562b4fc389c..1da9e8fc66744a744562ab682180ba664091a1f2 100644
--- a/formula/max.go
+++ b/formula/max.go
@@ -1,13 +1,26 @@
 package formula
 
 import (
-	"gitee.com/quant1x/pandas"
 	"gitee.com/quant1x/pandas/stat"
 )
 
 // MAX 两个序列横向对比
-func MAX(S1, S2 stat.Series) stat.Series {
-	d := stat.Maximum(S1.Floats(), S2.Floats())
-	return pandas.NewSeries(stat.SERIES_TYPE_FLOAT32, "", d)
+func MAX(S1 stat.Series, S2 any) stat.Series {
+	length := S1.Len()
+	var b []stat.DType
+	switch sx := S2.(type) {
+	case stat.Series:
+		b = sx.DTypes()
+	case int:
+		b = stat.Repeat[stat.DType](stat.DType(sx), length)
+	case stat.DType:
+		b = stat.Repeat[stat.DType](sx, length)
+	//case int8, uint8, int16, uint16, int32, uint32, int64, uint64, int, uint, uintptr, float32, float64:
+	//	b = Repeat[DType](DType(sx), length)
+	default:
+		panic(stat.Throw(S2))
+	}
+	d := stat.Maximum(S1.DTypes(), b)
+	return stat.NewSeries[stat.DType](d...)
 
 }
diff --git a/formula/min.go b/formula/min.go
index 2303e4f81fe25e7eaaeb1f2453c5165778896a05..dafaa434cd66cefe50edf959aff32f75f2f9c799 100644
--- a/formula/min.go
+++ b/formula/min.go
@@ -1,13 +1,26 @@
 package formula
 
 import (
-	"gitee.com/quant1x/pandas"
 	"gitee.com/quant1x/pandas/stat"
 )
 
 // MIN 两个序列横向对比
-func MIN(S1, S2 stat.Series) stat.Series {
-	d := stat.Minimum(S1.Floats(), S2.Floats())
-	return pandas.NewSeries(stat.SERIES_TYPE_FLOAT32, "", d)
+func MIN(S1 stat.Series, S2 any) stat.Series {
+	length := S1.Len()
+	var b []stat.DType
+	switch sx := S2.(type) {
+	case stat.Series:
+		b = sx.DTypes()
+	case int:
+		b = stat.Repeat[stat.DType](stat.DType(sx), length)
+	case stat.DType:
+		b = stat.Repeat[stat.DType](sx, length)
+	//case int8, uint8, int16, uint16, int32, uint32, int64, uint64, int, uint, uintptr, float32, float64:
+	//	b = Repeat[DType](DType(sx), length)
+	default:
+		panic(stat.Throw(S2))
+	}
+	d := stat.Minimum(S1.DTypes(), b)
+	return stat.NewSeries[stat.DType](d...)
 
 }
diff --git a/formula/ref.go b/formula/ref.go
index b74adf3bccc09891200946a2fb765ce5965fb44f..315b3f2fbfd542a52fd47669d590c03aaf28f701 100644
--- a/formula/ref.go
+++ b/formula/ref.go
@@ -6,19 +6,18 @@ import (
 )
 
 // REF 引用前N的序列
-func REF(S stat.Series, N any) any {
-	var X []float32
+func REF(S stat.Series, N any) stat.Series {
+	var X []stat.DType
 	switch v := N.(type) {
 	case int:
-		X = stat.Repeat[float32](float32(v), S.Len())
+		X = stat.Repeat[stat.DType](stat.DType(v), S.Len())
 	case stat.Series:
-		vs := v.Values()
-		X = stat.SliceToFloat32(vs)
-		X = stat.Align(X, stat.Nil2Float32, S.Len())
+		vs := v.DTypes()
+		X = stat.Align(vs, stat.DTypeNaN, S.Len())
 	default:
 		panic(exception.New(1, "error window"))
 	}
-	return S.Ref(X).Values()
+	return S.Ref(X)
 }
 
 func REF2[T stat.GenericType](S []T, N any) []T {
@@ -28,7 +27,7 @@ func REF2[T stat.GenericType](S []T, N any) []T {
 	case int:
 		X = stat.Repeat[stat.DType](stat.DType(v), sLen)
 	case []stat.DType:
-		X = stat.Align(X, stat.Nil2Float64, sLen)
+		X = stat.Align(v, stat.DTypeNaN, sLen)
 	default:
 		panic(exception.New(1, "error window"))
 	}
diff --git a/formula/sma.go b/formula/sma.go
index 9cf4abda0c9465f5d6cfc78d7d58512cf2f92cf8..5bd96931ba6671de2c824fc27586aaa9fc0ae06e 100644
--- a/formula/sma.go
+++ b/formula/sma.go
@@ -6,7 +6,7 @@ import (
 )
 
 // SMA 中国式的SMA,至少需要120周期才精确 (雪球180周期)    alpha=1/(1+com)
-func SMA(S stat.Series, N any, M int) any {
+func SMA(S stat.Series, N any, M int) stat.Series {
 	if M == 0 {
 		M = 1
 	}
@@ -21,7 +21,8 @@ func SMA(S stat.Series, N any, M int) any {
 	default:
 		panic(exception.New(1, "error window"))
 	}
-	x := S.EWM(stat.EW{Alpha: float64(M) / float64(X), Adjust: false}).Mean().Values()
+	//x := S.EWM(stat.EW{Alpha: float64(M) / float64(X), Adjust: false}).Mean().Values()
+	x := S.EWM(stat.EW{Alpha: float64(M) / float64(X), Adjust: false}).Mean()
 	return x
 }
 
diff --git a/indicator/rsi.go b/indicator/rsi.go
new file mode 100644
index 0000000000000000000000000000000000000000..464cb22fda3ee56c7ba7224c62a08ec2b650dc8b
--- /dev/null
+++ b/indicator/rsi.go
@@ -0,0 +1,37 @@
+package indicator
+
+import (
+	"gitee.com/quant1x/pandas"
+	. "gitee.com/quant1x/pandas/formula"
+)
+
+// RSI 指标
+//
+//	LC:=REF(CLOSE,1);
+//	LC赋值:1日前的收盘价
+//	RSI1:SMA(MAX(CLOSE-LC,0),N1,1)/SMA(ABS(CLOSE-LC),N1,1)*100;
+//	输出RSI1:收盘价-LC和0的较大值的N1日[1日权重]移动平均/收盘价-LC的绝对值的N1日[1日权重]移动平均*100
+//	RSI2:SMA(MAX(CLOSE-LC,0),N2,1)/SMA(ABS(CLOSE-LC),N2,1)*100;
+//	输出RSI2:收盘价-LC和0的较大值的N2日[1日权重]移动平均/收盘价-LC的绝对值的N2日[1日权重]移动平均*100
+//	RSI3:SMA(MAX(CLOSE-LC,0),N3,1)/SMA(ABS(CLOSE-LC),N3,1)*100;
+//	输出RSI3:收盘价-LC和0的较大值的N3日[1日权重]移动平均/收盘价-LC的绝对值的N3日[1日权重]移动平均*100
+//
+//	系统默认参数6,12,24
+func RSI(df pandas.DataFrame, N1, N2, N3 int) pandas.DataFrame {
+	var (
+		CLOSE = df.ColAsNDArray("close")
+		//HIGH  = df.ColAsNDArray("high")
+		//LOW   = df.ColAsNDArray("low")
+	)
+	//	LC:=REF(CLOSE,1);
+	LC := REF(CLOSE, 1)
+	cls := CLOSE.Sub(LC)
+	//	RSI1:SMA(MAX(CLOSE-LC,0),N1,1)/SMA(ABS(CLOSE-LC),N1,1)*100;
+	RSI1 := SMA(MAX(cls, 0), N1, 1).Div(SMA(ABS(cls), N1, 1)).Mul(100)
+	//	RSI2:SMA(MAX(CLOSE-LC,0),N2,1)/SMA(ABS(CLOSE-LC),N2,1)*100;
+	RSI2 := SMA(MAX(cls, 0), N2, 1).Div(SMA(ABS(cls), N2, 1)).Mul(100)
+	//	RSI3:SMA(MAX(CLOSE-LC,0),N3,1)/SMA(ABS(CLOSE-LC),N3,1)*100;
+	RSI3 := SMA(MAX(cls, 0), N3, 1).Div(SMA(ABS(cls), N3, 1)).Mul(100)
+
+	return pandas.NewDataFrame(RSI1, RSI2, RSI3)
+}
diff --git a/indicator/rsi_test.go b/indicator/rsi_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..64dc3202fcf5022ba34e9346e27fc43a3291a4be
--- /dev/null
+++ b/indicator/rsi_test.go
@@ -0,0 +1,14 @@
+package indicator
+
+import (
+	"fmt"
+	"gitee.com/quant1x/pandas/data/cache"
+	"testing"
+)
+
+func TestRSI(t *testing.T) {
+	df := cache.KLine("sz002528")
+	fmt.Println(df)
+	df1 := RSI(df, 6, 12, 24)
+	fmt.Println(df1)
+}
diff --git a/stat/type_float32.go b/stat/type_float32.go
index 1fb7250321ed0275789fe6bacbd9032d5abdb023..38b5fec19d71a2480f10360c439548ea9eaea627 100644
--- a/stat/type_float32.go
+++ b/stat/type_float32.go
@@ -5,7 +5,6 @@ import (
 	"gitee.com/quant1x/pandas/exception"
 	"github.com/mymmsc/gox/logger"
 	"github.com/viterin/vek/vek32"
-	"golang.org/x/exp/slices"
 	"math"
 	"reflect"
 	"strconv"
@@ -66,7 +65,8 @@ func SliceToFloat32(v any) []float32 {
 	case []uint:
 		return slice_any_to_float32(values)
 	case []float32: // 克隆
-		return slices.Clone(values)
+		//return slices.Clone(values)
+		return values
 	case []float64: // 加速
 		return vek32.FromFloat64(values)
 	case []bool:
diff --git a/stat/type_float64.go b/stat/type_float64.go
index d583634da16d5afce0d188b7c842014fd2bc2ad0..251ce30650fd8e5ff165946dbad3ccbafad7ce43 100644
--- a/stat/type_float64.go
+++ b/stat/type_float64.go
@@ -5,7 +5,6 @@ import (
 	"gitee.com/quant1x/pandas/exception"
 	"github.com/mymmsc/gox/logger"
 	"github.com/viterin/vek"
-	"golang.org/x/exp/slices"
 	"math"
 	"reflect"
 	"strconv"
@@ -110,7 +109,8 @@ func SliceToFloat64(v any) []float64 {
 	case []float32: // 加速
 		return vek.FromFloat32(values)
 	case []float64: // 克隆
-		return slices.Clone(values)
+		//return slices.Clone(values)
+		return values
 	case []bool:
 		count := len(values)
 		if count == 0 {