diff --git a/swagger-docs/en/trade/order/estimate_available_buy_limit.yml b/swagger-docs/en/trade/order/estimate_available_buy_limit.yml
index eefba59a..07fe5bd6 100644
--- a/swagger-docs/en/trade/order/estimate_available_buy_limit.yml
+++ b/swagger-docs/en/trade/order/estimate_available_buy_limit.yml
@@ -49,7 +49,7 @@ paths:
           config = Config.from_env()
           ctx = TradeContext(config)
 
-          resp = ctx.estimate_available_buy_limit(
+          resp = ctx.estimate_max_purchase_quantity(
               symbol = "700.HK",
               order_type = OrderType.LO,
               side = OrderSide.Buy,
diff --git a/swagger-docs/zh-CN/trade/order/estimate_available_buy_limit.yml b/swagger-docs/zh-CN/trade/order/estimate_available_buy_limit.yml
index fdbcc331..00dd5b22 100644
--- a/swagger-docs/zh-CN/trade/order/estimate_available_buy_limit.yml
+++ b/swagger-docs/zh-CN/trade/order/estimate_available_buy_limit.yml
@@ -49,7 +49,7 @@ paths:
           config = Config.from_env()
           ctx = TradeContext(config)
 
-          resp = ctx.estimate_available_buy_limit(
+          resp = ctx.estimate_max_purchase_quantity(
               symbol = "700.HK",
               order_type = OrderType.LO,
               side = OrderSide.Buy,
diff --git a/swagger-docs/zh-HK/trade/order/estimate_available_buy_limit.yml b/swagger-docs/zh-HK/trade/order/estimate_available_buy_limit.yml
index 465020be..6ef74bb7 100644
--- a/swagger-docs/zh-HK/trade/order/estimate_available_buy_limit.yml
+++ b/swagger-docs/zh-HK/trade/order/estimate_available_buy_limit.yml
@@ -49,7 +49,7 @@ paths:
           config = Config.from_env()
           ctx = TradeContext(config)
 
-          resp = ctx.estimate_available_buy_limit(
+          resp = ctx.estimate_max_purchase_quantity(
               symbol = "700.HK",
               order_type = OrderType.LO,
               side = OrderSide.Buy,