they are ascending and descending triangles. triangles also act as support/resistance. you can learn what they mean: here: <a href="http://www.informedtrades.com/3557-learn-trade-triangle-chart-patterns-part-1-a.html" target="_blank">http://www.informedtrades.com/3557-learn-trade-triangle-chart-patterns-part-1-a.html</a> and here: <a href="http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:chart_patterns:ascending_triangle_c" target="_blank">http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:chart_patterns:ascending_triangle_c</a> <a href="http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:chart_patterns:descending_triangle_" target="_blank">http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:chart_patterns:descending_triangle_</a>