
In order to have a valid signal the FxBay MACD and the Half Trend TT arrow must 
coincide. This means that the FxBay MACD must be close to the zero line since
the trade must be made only after the Renko brick has closed at which time the
FxBay MACD is at or has crossed the zero line. 

The first picture shows a false signal since the arrow is on a Renko brick that
has not yet closed and the FxBay MACD is positive and way too far from the zero 
line. The second picture shows that the arrow disappeared confirming that
the arrow was a false signal.

https://www.forexfactory.com/thread/post/13503785#post13503785 shows false signal 
and after arrow disappeared with the 2 pictures.

The third and fourth pictures also show false signals.

To recapitulate a valid signal must meet two conditions:

1. There is an arrow and the next brick is the same color as the brick where the
signal was given.
2. The FxBay MACD line must be crossed in the right direction of the brick after 
the signal.

Sometimes the next brick will not be the same color as the brick where the signal
occurred. In that case the signal is not valid. I had to roll back the WTI chart 
to 30 March to find a false signal so it's quite rare. The first arrow in the 
fifth picture is a valid signal the second arrow is a false signal.
