“…Many researchers have applied deep learning to the question of stock market prediction. There are several approaches for stock market prediction, such as analyzing indicators of historical time series data [ 16 , 17 , 18 , 19 , 20 ], or using candlestick chart converted from historical data [ 21 , 22 , 23 , 24 , 25 , 26 ], or analyzing the social media [ 27 , 28 , 29 , 30 , 31 , 32 ], or analyzing the financial news [ 33 , 34 , 35 , 36 ]. However, using a single classifier may not achieve maximum performance compared with using combined classifiers.…”