ret_ar2_ma3 = ARIMA(mydatats.INR_diff, order = (5,0,3))
result_ret_ar2_ma3 = ret_ar2_ma3.fit()
fcst_ar2_ma3 = result_ret_ar2_ma3.predict(start= "04/01/2021", end= "04/01/2022")
plt.plot(fcst_ar2_ma3, color = "red", linewidth = 2, label = "AR9")
plt.show()