fibonacci expansion problem

 
Hi guys I have a problem with my fibonacci expansion.

I trade 1-2-3 swings. That means I see a starting point (point A). Then it goes up to a top which is POINT B. Then it retraces lower and forms a point c which is higher than point A and lower than point B. When it crosses point B and it is going higher I buy. To sell I use my fibonacci expansion. I sell my position on the 1,168 level.

Here is the problem. I don't know how to use it on my mt5 platform. If I want to go long I put my fibonacci expansion to point A and then point B or to point B and then point A. Then I have to drag it to point C or it is ok?
Documentation on MQL5: Standard Constants, Enumerations and Structures / Objects Constants / Object Types
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Standard Constants, Enumerations and Structures / Objects Constants / Object Types - Documentation on MQL5
 

If you use the fibo expansion tool:

  1. Click and release on point A 
  2. Click point B and drag your cursor to point C
If you use the fibo retracement tool and want to find expansion that way, click and drag from point B to point A.