Can you explain what the wicks or tails of Renko charts represent?
The tails of a Renko candlestick represent the high and low prices achieved in each bar, just like any other periodicity. Traditional Renko chartists are accumusted to plotting Renko bars without the tails. This can be achieved by changing the style of the bars to Wickless Candles (right-click in chart and choose "Style: Wickless Candles"). However, plotting Renko with a style of "Candlestick" and thus showing the wicks or tails can provide some important additional information regarding how high and how low price moved during the formation of that Renko bar.