Is Tata Steel an Ending DIagonal?Tata Steel chart - if we connect all the highs and lows since September, it can look like an ED or 'ending diagonal' pattern. The ED is a triangle pattern that occurs at the end of a trend and is marked as a-b-c-d-e in the direction of the existing trend. After wave e, we try to anticipate a trend reversal. This pattern will further confirm if the ED's lower line also breaks.