An indicator of patterns #11 and #12 ("Diamond Tops" and "Diamond Bottoms") from Encyclopedia of Chart Patterns by Thomas N. Bulkowski.

Parameters:

• alerts - show alert when an arrow appears  
• Push - send a push notification when an arrow appears (requires configuration in the terminal)
• PeriodBars - indicator period
• K - an additional parameter that influences the accuracy of pattern shape recognition
• ArrowType - a symbol from 1 to 17
• ArrowVShift - vertical shift of arrows in points 

Note. Arrows appear on a forming bar and do not disappear.  

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