diff --git a/src/my_project/interviews/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.py b/src/my_project/interviews/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.py
new file mode 100644
index 00000000..c863b07d
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.py
@@ -0,0 +1,19 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC
+import math
+
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+
+        min_price = math.inf
+        max_profit = 0
+        len_prices = len(prices)
+
+        for i in range(len_prices):
+
+            if prices[i] < min_price:
+                min_price = prices[i]
+            elif prices[i] - min_price > max_profit:
+                max_profit = prices[i] - min_price
+
+        return max_profit
\ No newline at end of file
diff --git a/src/my_project/interviews_typescript/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.ts b/src/my_project/interviews_typescript/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.ts
new file mode 100644
index 00000000..b031d140
--- /dev/null
+++ b/src/my_project/interviews_typescript/top_150_questions_round_23/ex_07_best_time_to_sell_stocks_i.ts
@@ -0,0 +1,17 @@
+function maxProfit(prices: number[]): number {
+
+    let minValuePrice: number = 10**6 + 1
+    let maxProfit: number = 0
+
+    for (let i = 0; i < prices.length; i++){
+        if (prices[i] < minValuePrice){
+            minValuePrice = prices[i]
+        }
+        else if (prices[i] - minValuePrice > maxProfit){
+            maxProfit = prices[i] - minValuePrice
+        }
+    }
+
+    return maxProfit
+
+}
\ No newline at end of file
diff --git a/tests/test_150_questions_round_23/test_07_best_time_to_sell_stocks_i_round_23.py b/tests/test_150_questions_round_23/test_07_best_time_to_sell_stocks_i_round_23.py
new file mode 100644
index 00000000..5e12a06c
--- /dev/null
+++ b/tests/test_150_questions_round_23/test_07_best_time_to_sell_stocks_i_round_23.py
@@ -0,0 +1,11 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_23\
+.ex_07_best_time_to_sell_stocks_i import Solution
+
+class BestTimeToSellStockTestCase(unittest.TestCase):
+
+    def test_best_time_to_sell_stock(self):
+        solution = Solution()
+        output = solution.maxProfit(prices=[7,1,5,3,6,4])
+        target = 5 
+        self.assertEqual(output, target)
\ No newline at end of file