diff --git a/pkg/exchange/binance/exchange.go b/pkg/exchange/binance/exchange.go
index 9dc464e65..45b1a48f0 100644
--- a/pkg/exchange/binance/exchange.go
+++ b/pkg/exchange/binance/exchange.go
@@ -118,7 +118,30 @@ func New(key, secret string) *Exchange {
 			if err != nil {
 				log.WithError(err).Error("can not set server time")
 			}
+
+			if err = client2.SetTimeOffsetFromServer(context.Background()); err != nil {
+				log.WithError(err).Error("can not set server time")
+			}
 		})
+		go func() {
+			ticker := time.NewTicker(time.Hour)
+			defer ticker.Stop()
+			for _ = range ticker.C {
+				_, err = client.NewSetServerTimeService().Do(context.Background())
+				if err != nil {
+					log.WithError(err).Error("can not set server time")
+				}
+
+				_, err = futuresClient.NewSetServerTimeService().Do(context.Background())
+				if err != nil {
+					log.WithError(err).Error("can not set server time")
+				}
+
+				if err = client2.SetTimeOffsetFromServer(context.Background()); err != nil {
+					log.WithError(err).Error("can not set server time")
+				}
+			}
+		}()
 	}
 
 	return &Exchange{
@@ -1611,6 +1634,30 @@ func (e *Exchange) QueryPositionRisk(ctx context.Context, symbol string) (*types
 	return convertPositionRisk(risks[0])
 }
 
+var SupportedIntervals = map[types.Interval]int{
+	types.Interval1m:  1,
+	types.Interval5m:  5,
+	types.Interval15m: 15,
+	types.Interval30m: 30,
+	types.Interval1h:  60,
+	types.Interval2h:  60 * 2,
+	types.Interval4h:  60 * 4,
+	types.Interval6h:  60 * 6,
+	types.Interval12h: 60 * 12,
+	types.Interval1d:  60 * 24,
+	types.Interval3d:  60 * 24 * 3,
+	types.Interval1w:  60 * 24 * 7,
+}
+
+func (e *Exchange) SupportedInterval() map[types.Interval]int {
+	return SupportedIntervals
+}
+
+func (e *Exchange) IsSupportedInterval(interval types.Interval) bool {
+	_, ok := SupportedIntervals[interval]
+	return ok
+}
+
 func getLaunchDate() (time.Time, error) {
 	// binance launch date 12:00 July 14th, 2017
 	loc, err := time.LoadLocation("Asia/Shanghai")
diff --git a/pkg/exchange/max/exchange.go b/pkg/exchange/max/exchange.go
index 098dd8ccf..264044bc8 100644
--- a/pkg/exchange/max/exchange.go
+++ b/pkg/exchange/max/exchange.go
@@ -979,3 +979,26 @@ func (e *Exchange) DefaultFeeRates() types.ExchangeFee {
 		TakerFeeRate: fixedpoint.NewFromFloat(0.01 * 0.150), // 0.15%
 	}
 }
+
+var SupportedIntervals = map[types.Interval]int{
+	types.Interval1m:  1,
+	types.Interval5m:  5,
+	types.Interval15m: 15,
+	types.Interval30m: 30,
+	types.Interval1h:  60,
+	types.Interval2h:  60 * 2,
+	types.Interval4h:  60 * 4,
+	types.Interval6h:  60 * 6,
+	types.Interval12h: 60 * 12,
+	types.Interval1d:  60 * 24,
+	types.Interval3d:  60 * 24 * 3,
+}
+
+func (e *Exchange) SupportedInterval() map[types.Interval]int {
+	return SupportedIntervals
+}
+
+func (e *Exchange) IsSupportedInterval(interval types.Interval) bool {
+	_, ok := SupportedIntervals[interval]
+	return ok
+}
diff --git a/pkg/fixedpoint/convert.go b/pkg/fixedpoint/convert.go
index 3086806f0..44f220078 100644
--- a/pkg/fixedpoint/convert.go
+++ b/pkg/fixedpoint/convert.go
@@ -198,18 +198,6 @@ func (v *Value) AtomicLoad() Value {
 }
 
 func (v *Value) UnmarshalYAML(unmarshal func(a interface{}) error) (err error) {
-	var f float64
-	if err = unmarshal(&f); err == nil {
-		*v = NewFromFloat(f)
-		return
-	}
-
-	var i int64
-	if err = unmarshal(&i); err == nil {
-		*v = NewFromInt(i)
-		return
-	}
-
 	var s string
 	if err = unmarshal(&s); err == nil {
 		nv, err2 := NewFromString(s)
diff --git a/pkg/fixedpoint/dec.go b/pkg/fixedpoint/dec.go
index f25c20d78..70ba35f3e 100644
--- a/pkg/fixedpoint/dec.go
+++ b/pkg/fixedpoint/dec.go
@@ -1032,6 +1032,10 @@ func (x Value) Compare(y Value) int {
 	return Compare(x, y)
 }
 
+func (v Value) MarshalYAML() (interface{}, error) {
+        return v.FormatString(8), nil
+}
+
 func (v *Value) UnmarshalYAML(unmarshal func(a interface{}) error) (err error) {
 	var f float64
 	if err = unmarshal(&f); err == nil {
diff --git a/pkg/fixedpoint/dec_test.go b/pkg/fixedpoint/dec_test.go
index ffbc3bc78..269904c1b 100644
--- a/pkg/fixedpoint/dec_test.go
+++ b/pkg/fixedpoint/dec_test.go
@@ -3,6 +3,7 @@ package fixedpoint
 import (
 	"encoding/json"
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
 	"math/big"
 	"testing"
 )
@@ -175,6 +176,46 @@ func TestJson(t *testing.T) {
 	_ = json.Unmarshal([]byte("6e-8"), &p)
 	_ = json.Unmarshal([]byte("0.000062"), &q)
 	assert.Equal(t, "0.00006194", q.Sub(p).String())
+
+}
+
+func TestYaml(t *testing.T) {
+	p := MustNewFromString("0")
+	e, err := yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "\"0.00000000\"\n", string(e))
+	p = MustNewFromString("1.00000003")
+	e, err = yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "\"1.00000003\"\n", string(e))
+	p = MustNewFromString("1.000000003")
+	e, err = yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "\"1.00000000\"\n", string(e))
+	p = MustNewFromString("1.000000008")
+	e, err = yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "\"1.00000000\"\n", string(e))
+	p = MustNewFromString("0.999999999")
+	e, err = yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "\"0.99999999\"\n", string(e))
+
+	p = MustNewFromString("1.2e-9")
+	e, err = yaml.Marshal(p)
+	assert.NoError(t, err)
+	assert.Equal(t, "0.00000000", p.FormatString(8))
+	assert.Equal(t, "\"0.00000000\"\n", string(e))
+
+	_ = yaml.Unmarshal([]byte("0.00153917575"), &p)
+	assert.Equal(t, "0.00153917", p.FormatString(8))
+
+	q := NewFromFloat(0.00153917575)
+	assert.Equal(t, p, q)
+	_ = yaml.Unmarshal([]byte("6e-8"), &p)
+	_ = yaml.Unmarshal([]byte("0.000062"), &q)
+	assert.Equal(t, "0.00006194", q.Sub(p).String())
+
 }
 
 func TestNumFractionalDigits(t *testing.T) {
diff --git a/pkg/types/interval.go b/pkg/types/interval.go
index a06e083e5..2809ab56c 100644
--- a/pkg/types/interval.go
+++ b/pkg/types/interval.go
@@ -51,6 +51,9 @@ var Interval6h = Interval("6h")
 var Interval12h = Interval("12h")
 var Interval1d = Interval("1d")
 var Interval3d = Interval("3d")
+var Interval1w = Interval("1w")
+var Interval2w = Interval("2w")
+var Interval1mo = Interval("1mo")
 
 var SupportedIntervals = map[Interval]int{
 	Interval1m:  1,
@@ -64,6 +67,9 @@ var SupportedIntervals = map[Interval]int{
 	Interval12h: 60 * 12,
 	Interval1d:  60 * 24,
 	Interval3d:  60 * 24 * 3,
+	Interval1w:  60 * 24 * 7,
+	Interval2w:  60 * 24 * 14,
+	Interval1mo: 60 * 24 * 30,
 }
 
 // IntervalWindow is used by the indicators