diff --git a/src/stock.ts b/src/stock.ts
index 86098dc..92a6141 100644
--- a/src/stock.ts
+++ b/src/stock.ts
@@ -17,6 +17,10 @@ export class Stock {
         this.time = new Date();
     }
 
+    static printfHeader() {
+        console.log(`Stock\tPrice\t\tVolume\t\tOpenPrice\tHighestPrice\tLowestPrice\tTime`);
+    }
+
     printf () {
         const volume = this.f(this.volume);
         console.log(`${this.code}\t${this.f(this.currentPrice)}\t\t${volume}${volume.length >= 9 ? '\t' : '\t\t' }${this.f(this.openPrice)}\t\t${this.f(this.highestPrice)}\t\t${this.f(this.lowestPrice)}\t\t${this.time.toLocaleTimeString()}`);
diff --git a/src/stock_api.ts b/src/stock_api.ts
index d4d9ab8..76e35eb 100644
--- a/src/stock_api.ts
+++ b/src/stock_api.ts
@@ -1,7 +1,8 @@
 import { Helper } from './helper';
+import { Stock } from './stock';
 
 const gets = (stockCodes: string[]) => {
-    console.log(`Stock\tPrice\t\tVolume\t\tOpenPrice\tHighestPrice\tLowestPrice\tTime`);
+    Stock.printfHeader();
     try {
         return Promise.all(stockCodes.map((code) => {
             return Helper.fetchStock(code).then(stock => stock && stock.printf());
@@ -12,7 +13,7 @@ const gets = (stockCodes: string[]) => {
 }
 
 const stream = (stockCode: string) => {
-    console.log(`Stock\tPrice\t\tVolume\t\t\tOpenPrice\tHighestPrice\tLowestPrice\tTime`);
+    Stock.printfHeader();
     setInterval(() => {
         Helper.fetchStock(stockCode).then(stock => stock && stock.printf());
     }, 2000);