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Renko chart
Invented in Japan, Renko charts ignore time and focus solely on price changes that meet a minimum requirement. In this regard, these charts are quite similar to Point & Figure charts. Instead of X-Columns and O-Columns, Renko charts use price “bricks” that represent a fixed price move. These bricks are sometimes referred to as “blocks” or “boxes.” They move up or down in 45 degree lines with one brick per vertical column. Bricks for upward price movements are hollow while bricks for falling price movements are filled with a solid color (typically black).
http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:renko