Candlestick pattens can work for any given time frame but best results are observed for 1D period. For example, say you feel, certain stock price might go up over a few weeks. It is best to observe the daily pattern of candlesticks. The momentum can be confirmed if any bullish pattern was observed lately (e.g. bullish engulfing).

But personally, I do not find it much help for hourly charts. Since the price does not move that much over an hour, it is difficult to predict the price/trend using only candlestick patterns.

Hope this answers your question.