Kumo Cross Level

DESCRIPTION WORK:
 
Create an indicator from the cross of  ichimoku lines Ssa and Ssb,
define the price level at the crossing, which is not the current price level,
add two different graphical object representations, Rectangle and Trend Line ,
on two different time frames.

...

-- 1b: definition price levels:
 ((Ssa price  +  Ssb price) / 2 (BEFORE crossing)  +  (Ssa price  +  Ssb price) / 2 (AFTER the cross)) / 2 = an approximate average price satisfactory.
is this correct ? Or did there is better ?

...