Impact of COVID-19 on Forecasting Stock Prices: An Integration of Stationary Wavelet Transform and Bidirectional Long Short-Term Memory

Figure 2

Signal decomposition using SWT at level five (h_i: high-level features at decomposition level i; l_i: low-level features at decomposition level i; cD_i: detail coefficients at decomposition level i; cA₅: approximation coefficients at decomposition level five).