diff --git a/examples/highfreq/workflow.py b/examples/highfreq/workflow.py
index 0dbca6e19..01de59c0e 100644
--- a/examples/highfreq/workflow.py
+++ b/examples/highfreq/workflow.py
@@ -31,7 +31,7 @@ class HighfreqWorkflow(object):
 
     SPEC_CONF = {"custom_ops": [DayLast, FFillNan, BFillNan, Date, Select, IsNull, Cut], "expression_cache": None}
 
-    MARKET = ["SH600004"]
+    MARKET = "all"
     BENCHMARK = "SH000300"
 
     start_time = "2020-09-15 00:00:00"