diff --git a/algorithms/StockMaximize.py b/algorithms/StockMaximize.py
new file mode 100644
index 0000000..e9010ac
--- /dev/null
+++ b/algorithms/StockMaximize.py
@@ -0,0 +1,14 @@
+def stockmax(p):
+    c=p[len(p)-1]
+    a=0
+    for i in range(len(p)-1,-1,-1):
+        if c<p[i]:
+            c=p[i]
+        a+=(c-p[i])
+    return a
+
+t=int(input())
+for k in range(0,t):
+    n=int(input())
+    l=list(map(int,input().split()))
+    print(stockmax(l))