diff --git a/src/views/contract/exchange-store.vue b/src/views/contract/exchange-store.vue
index 9201cb4..59e3305 100644
--- a/src/views/contract/exchange-store.vue
+++ b/src/views/contract/exchange-store.vue
@@ -336,7 +336,7 @@ export default {
         // console.info(this.form.lever_rate)
         // console.info(this.margin)
         if (!this.form.lever_rate || !this.margin) return 0;
-        let p=this.margin*this.form.lever_rate;
+        let p = Math.round(this.margin*this.form.lever_rate);
         
         this.form.amount=p;
         return p