Midnighter Battle computer is good. If he can analyze his opponent.
The problem is, he doesn't know everything about Danny Rands powers.
And they're not exactly "public knowledge" either, the general public thinks he's Bruce Lee with a magic fist. They don't know about the "hypnotic fist" trick he learned from the Book of the Iron Fist. Or, that he can bust out Hadouken's on command (Or don't you think Elektra would have tried dodging it?)
How can his Battle Computer stop an explosion the size of a city block? Because Iron Fist can totally level a city block.
Not to mention, he has the "Drunken Style" he used on Mr. X, who has actual telepathic powers. I'd bet money if he can mess with his move reading hax, Mids will have trouble getting a proper read on him with his Battle Computer. Garbage in, garbage out.