A personal story...
I've tried all these chart types, Line, Bar and Candlestick.
Line charts - Quite useless really as they only show 1 piece of price information. I did once, believe it or not, try a strategy based on the Line chart. It involved 4 lines, each representing the Open, High, Low, Close on a 1 Hour chart - It was, at best, truly useless!
Bar Chart - I just don't see the point. Yes, it displays the same information as the Candlestick chart but the Candlestick chart (with it's body instead of a stick) is just so much clearer.
I have also tried the Tick and the Point and Figure chart types too to no avail.
At the end of the day, the Candlestick chart is the clearest and the best.
I don't think I will ever be persuaded otherwise...