That is the worst advice I have yet to hear. I use both bar charts and line charts. I don't use candlestick or any other bullshit. Plain vanilla, "KISST" keep it simple stupid trading.
Line bars give you a view that a bar or candle charts does not give you. Line bars can give you better...
Its okay to change ones mind...most traders get caught on the wrong side and then they want to fight the trend...take a loss and go where the market is moving