diff --git a/pkg/indicator/low.go b/pkg/indicator/low.go
deleted file mode 100644
index 6f6d9468b..000000000
--- a/pkg/indicator/low.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package indicator
-
-import (
-	"time"
-
-	"github.com/c9s/bbgo/pkg/datatype/floats"
-	"github.com/c9s/bbgo/pkg/types"
-)
-
-//go:generate callbackgen -type Low
-type Low struct {
-	types.IntervalWindow
-	types.SeriesBase
-
-	Values  floats.Slice
-	EndTime time.Time
-
-	updateCallbacks []func(value float64)
-}
-
-func (inc *Low) Update(value float64) {
-	if len(inc.Values) == 0 {
-		inc.SeriesBase.Series = inc
-	}
-
-	inc.Values.Push(value)
-}
-
-func (inc *Low) PushK(k types.KLine) {
-	if k.EndTime.Before(inc.EndTime) {
-		return
-	}
-
-	inc.Update(k.Low.Float64())
-	inc.EndTime = k.EndTime.Time()
-	inc.EmitUpdate(inc.Last(0))
-}
diff --git a/pkg/indicator/low_callbacks.go b/pkg/indicator/low_callbacks.go
deleted file mode 100644
index bd261b79a..000000000
--- a/pkg/indicator/low_callbacks.go
+++ /dev/null
@@ -1,15 +0,0 @@
-// Code generated by "callbackgen -type Low"; DO NOT EDIT.
-
-package indicator
-
-import ()
-
-func (inc *Low) OnUpdate(cb func(value float64)) {
-	inc.updateCallbacks = append(inc.updateCallbacks, cb)
-}
-
-func (inc *Low) EmitUpdate(value float64) {
-	for _, cb := range inc.updateCallbacks {
-		cb(value)
-	}
-}