How to further inprove ARIMA model

@shashankvarshney wrote:

Hi All,
I am new to time series forecasting and ARIMA.
I am fitting ARIMA model and used auto.arima() in R.
I got following residual plot and I can see lot of significant autocorrelation and partial-autocorrelation.

I need help in interpretation of residual ACF and PACF graphs and how can I further improve the mode? Following is the residual display.

auto.arima.jpeg2844x1498 351 KB

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