No it's not overrated mate , you can't be a successful trader if you can't read and analysis   those candle stick. Specially when you will go for day trading or mid-term trading then it's very important . Because 100% prediction is never possible in trading, and what is possible is through market analysis. And these analyzes of the market are done by candlesticks. Without the candlesticks, no analysis is possible whether you say long-term or short-term, so in my opinion candlesticks cannot be called overrated , they are very important things for trading.