diff --git a/examples/trade/agent/basic.py b/examples/trade/agent/basic.py
index 48cc2901b..f6adc19ca 100644
--- a/examples/trade/agent/basic.py
+++ b/examples/trade/agent/basic.py
@@ -1,5 +1,3 @@
-from joblib import Parallel, delayed
-from numba import njit, prange
 from tianshou.policy import BasePolicy
 from tianshou.data import Batch
 import numpy as np
@@ -67,5 +65,7 @@ class AC(VWAP):
         t = t + 1
         k_tild = self.lamb / self.eta * sig * sig
         k = np.arccosh(k_tild / 2 + 1)
-        act = (np.sinh(k * (self.T - t)) - np.sinh(k * (self.T - t - 1))) / np.sinh(k * self.T)
+        act = (np.sinh(k * (self.T - t)) - np.sinh(k * (self.T - t - 1))) / np.sinh(
+            k * self.T
+        )
         return Batch(act=act, state=state)
diff --git a/examples/trade/requirements.txt b/examples/trade/requirements.txt
new file mode 100644
index 000000000..ce27c2306
--- /dev/null
+++ b/examples/trade/requirements.txt
@@ -0,0 +1,10 @@
+tianshou==0.3.0.post1
+torch==1.6.0
+numba==0.51.2
+pandas==1.1.3
+tqdm==4.50.2
+numpy==1.19.1
+gym==0.17.3
+env==0.1.0
+PyYAML==5.4.1
+redis==3.5.3