```
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
data = pd.read_csv("gold_price.csv")
data = data.rolling(window=50).mean()
data = np.where(data > data, 1, 0)
data = np.where(data < data, 1, 0)
plt.figure(figsize=(12,6))
plt.plot(data, label="Price")
plt.plot(data, label="MA50")
plt.plot(data.loc[data == 1, "Price"], "go", label="Buy")
plt.plot(data.loc[data == 1, "Price"], "ro", label="Sell")
plt.legend(loc="upper left")
plt.show()
```
