Trump Echo -
When declarer begins drawing trump, the defenders naturally play a
low-high signal showing a even number of cards, first
discarding a lower card and subsequently discarding a higher card.
declarer is playing in a Spade contract, leading the SA.
Playing Trump Echo, count signals are the opposite of standard count signals
in other suits. When a defender holds 2 trumps, playing low to
preserve a possible winning honor is important.
holding 3 trump the defender can usually afford to play the middle card
(except a significant honor). Should partner play medium then low on
opponent's trump but stop after two rounds, in certain situation it is
useful to know partner has a remaining trump - likely a winner.
Similarly, consider the scenario where declarer appears to be 5-3 in trump;
when the declarer leads a high trump, one defender plays a singleton trump
while their partner signals with a low trump, high trump. After the second
trump play, Declarer switches to a new suit. Apparently the other
defender holds an even number, likely 4 trump.
High-low shows an odd number of cards in
Low-high shows an even number of cards in
the suit, probably two
for count signals:
When a player holding 3 trump
can afford to signal with the middle cards
When it makes sense to provide
trump count signals
Trump Suit Preference