Carry scalping?

Beginner Questions
1

So I’m new to all this, been messing around with MACD and V-MA EAs, hoping to make a few to playtest in a dummy account.

Anyway, I was thinking about making a set of carry scalpers; an EA placed on each carry pair to check at the end of the night to see if it’s trending in the right direction, and if it is it could grab on and get a small gain AND the carry interest. I was looking at the calculators, and one said the daily interest payout on EURNZD was $12.16 per lot per night, but another calc said the USD value of a EURNZD pip is $15.70?! considering how high the spread is on some of those carry pairs it eats the whole thing up!

Is the carry really worth less than a pip, or am I reading things wrong?

2

Carry is based on position size.

Hypothetical:
For EURUSD shorts, you’ll get $0.06 per 10,000 you put on.
That’s $0.60 per 100,000 (Standard lot).

I like to try and scalp NZDJPY right before NY close on WED to get triple roll. If I spot a trade which follows my plan, I won’t hesitate to execute and take advantage of the roll.