1 +-----------------------------------------------------------------------------------------+   
      |                      +                     +                     +                      |   
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  0.5 |-+                                                                                     +-|   
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    0 |-+                                          A                                          +-|   
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 -0.5 |-+                                                                                     +-|   
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      |                      +                     +                     +                      |   
   -1 +-----------------------------------------------------------------------------------------+   
     0.99                  0.995                   1                   1.005                   1.01 
                                                                                                    
    2 +-----------------------------------------------------------------------------------------+   
      |                      +                     +                      +                  ** |   
      |                                                                                   ***   |   
      |                                                                                 **      |   
      |                                                                              ***        |   
      |                                                                            **           |   
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      |                                                                    ***                  |   
  1.5 |-+                                                                **                   +-|   
      |                                                               ***                       |   
      |                                                             **                          |   
      |                                                          ***                            |   
      |                                                        **                               |   
      |                                                     ***                                 |   
      |                                                   **                                    |   
      |                                                ***                                      |   
      |                                              **                                         |   
    1 |-+                                         *A*                                         +-|   
      |                                         **                                              |   
      |                                      ***                                                |   
      |                                    **                                                   |   
      |                                 ***                                                     |   
      |                               **                                                        |   
      |                            ***                                                          |   
      |                          **                                                             |   
      |                       ***                                                               |   
  0.5 |-+                   **                                                                +-|   
      |                  ***                                                                    |   
      |                **                                                                       |   
      |             ***                                                                         |   
      |           **                                                                            |   
      |        ***                                                                              |   
      |      **                                                                                 |   
      |   ***                                                                                   |   
      | **                   +                     +                      +                     |   
    0 +-----------------------------------------------------------------------------------------+   
      1                     1.5                    2                     2.5                    3