$V and $MA sitting right at all-time high breakout levels. Trump just disclosed huge positions in both. When the sitting president is long two names about to rip, you pay attention.

Bonus play: Trump also holds big $BRK.B, and Berkshire's top holding is $AXP. American Express is lagging Visa and Mastercard hard right now. If the other two card networks break out, $AXP could play catch-up fast.

Tail the whale. Simple setup, clear catalyst, asymmetric risk. If you're not watching payment processors here, you're missing the trade.