Based on the news about the stock in the past five trading days, please predict the rise or fall of the stock in the next trading day. If the stock is predicted to rise in the next trading day, please output [Rise], if the stock is predicted to fall in the next trading day, please output [Decrease].

Date:2019-10-22, Stock:BHP, The news for the past five days is as follows:
2019-10-15: nan
2019-10-16: NEWS1: Asian Stocks Mixed; Hong Kong Property Developers Gain on New Government Measures.NEWS2: Top Research Reports for Southern, Applied Materials & Vertex.
2019-10-17: nan
2019-10-18: nan
2019-10-21: NEWS1: UPDATE 3-Chile's Pinera vows 'new social contract' amid massive marches against inequality.NEWS2: Chile scrambles to clean up mess after weekend of chaos, violent protests.NEWS3: Workers at Chile's Escondida copper mine, world's largest, to walk off job Tuesday.

Answer: Rise