diff --git a/base.go b/base.go
index 05217fe..710e162 100644
--- a/base.go
+++ b/base.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/474420502/structure/compare"
 	"github.com/474420502/structure/tree/treelist"
+	"github.com/klauspost/compress/zstd"
 	"go.mongodb.org/mongo-driver/bson"
 )
 
@@ -22,10 +23,18 @@ func GetAll() (result *treelist.Tree[int64]) {
 
 	f, err := os.Open("./stocks.gob")
 	if err == nil {
-		err = gob.NewDecoder(f).Decode(&stocks)
+		dec, err := zstd.NewReader(f)
 		if err != nil {
 			panic(err)
 		}
+		defer dec.Close()
+		// dec := f
+		err = gob.NewDecoder(dec).Decode(&stocks)
+		if err != nil {
+			panic(err)
+		}
+		defer f.Close()
+
 	} else {
 		for cur.Next(context.TODO()) {
 			var s Stock
@@ -42,8 +51,15 @@ func GetAll() (result *treelist.Tree[int64]) {
 		if err != nil {
 			panic(err)
 		}
+		defer f.Close()
 
-		err = gob.NewEncoder(f).Encode(stocks)
+		enc, err := zstd.NewWriter(f)
+		if err != nil {
+			panic(err)
+		}
+		defer enc.Close()
+		// enc := f
+		err = gob.NewEncoder(enc).Encode(&stocks)
 		if err != nil {
 			panic(err)
 		}
diff --git a/main.go b/main.go
index 647bc55..72ee1d1 100644
--- a/main.go
+++ b/main.go
@@ -72,6 +72,7 @@ func GetDefaultPage() *rod.Page {
 var client *mongo.Client
 var cstock *mongo.Collection
 var DateStocks *treelist.Tree[int64]
+var CountedDays map[int]bool
 var err error
 
 func init() {
@@ -83,6 +84,10 @@ func init() {
 	}
 	cstock = client.Database("money").Collection("stock")
 	DateStocks = GetAll()
+	CountedDays = map[int]bool{}
+	for i := 1; i < 7; i++ {
+		CountedDays[1<<i] = true
+	}
 }
 
 func main() {
diff --git a/main_test.go b/main_test.go
index e07f4cb..8229fa7 100644
--- a/main_test.go
+++ b/main_test.go
@@ -1,12 +1,15 @@
 package moneymoney
 
 import (
+	"encoding/gob"
 	"log"
+	"os"
 	"sort"
 	"testing"
 	"time"
 
 	"github.com/474420502/structure/tree/treelist"
+	"github.com/klauspost/compress/zstd"
 )
 
 const 亿 = 100000000
@@ -182,15 +185,11 @@ func TestCase3(t *testing.T) {
 		cmpiter := citer.Clone()
 
 		var i = 0
-		var step = 1
-		for ; i < 2; i++ {
-			cmpiter.Prev()
-		}
 
+		// 向前移动的天数
 		for cmpiter.Valid() {
 
 			todayIter.SeekToFirst()
-
 			cmpday := cmpiter.Value().(*treelist.Tree[int64])
 
 			for todayIter.Valid() {
@@ -200,20 +199,64 @@ func TestCase3(t *testing.T) {
 				ic, ok := cmpday.Get(s.Code)
 				if ok {
 					c := ic.(*Stock)
-					// TODO 存这个属性
-					(c.ClosingPrice - s.ClosingPrice/c.ClosingPrice)
+					if c.Extend == nil {
+						c.Extend = &StockExtend{}
+					}
+					// 满足相邻天数的处理
+					if len(c.Extend.UpsDownsRatioDays) == 0 {
+						if _, ok := CountedDays[i]; ok {
+							UpsDownsRatioDays := ((c.ClosingPrice - s.ClosingPrice) / c.ClosingPrice)
+							c.Extend.UpsDownsRatioDays = append(c.Extend.UpsDownsRatioDays, UpsDownsRatioDays)
+						}
+					}
+
+					// TODO: 其他的统计处理
+
 				}
 
 				todayIter.Next()
 			}
 
-			step = step << 1
-			for i := 0; i < step; i++ {
-				cmpiter.Prev()
+			if i >= 1<<7 {
+				break
 			}
+
+			cmpiter.Prev()
+			i++
 		}
 		citer.Next()
 	}
+
+	var stocks []*Stock
+	DateStocks.Traverse(func(s *treelist.Slice[int64]) bool {
+		s.Value.(*treelist.Tree[int64]).Traverse(func(s *treelist.Slice[int64]) bool {
+			stocks = append(stocks, s.Value.(*Stock))
+			return true
+		})
+
+		return true
+	})
+
+	if stocks != nil {
+
+		f, err := os.OpenFile("./stocks1.gob", os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0644)
+		if err != nil {
+			panic(err)
+		}
+		defer f.Close()
+
+		enc, err := zstd.NewWriter(f)
+		if err != nil {
+			panic(err)
+		}
+		defer enc.Close()
+
+		err = gob.NewEncoder(enc).Encode(stocks)
+		if err != nil {
+			panic(err)
+		}
+	}
+
 }
 
 func TestCase2(t *testing.T) {
diff --git a/unity.go b/unity.go
index 9b18bd7..8d590f0 100644
--- a/unity.go
+++ b/unity.go
@@ -35,6 +35,14 @@ type Stock struct {
 	CirculatingMarketValue float64 `json:"流通市值" bson:"流通市值"`
 	// 股票数字代码
 	Code int64 `json:"股票数字代码" bson:"股票数字代码"`
+
+	Extend *StockExtend `json:"Extend" bson:"Extend"`
+}
+
+type StockExtend struct {
+	UpsDownsRatioDays []float64 `json:"UpsDownsRatioDays" bson:"UpsDownsRatioDays"`
+	MaxPriceDays      float64   `json:"MaxPriceDays" bson:"MaxPriceDays"`
+	MinPriceDay       float64   `json:"MinPriceDay" bson:"MinPriceDay"`
 }
 
 type StockBase struct {