Why did their stock price fall so much today and why did it go up like it did after their last quarter lose?

This is my idea as to why the stock went down.  They are going to have to improve their total revenues from parts and service.  The dealers that survived the 80's depended on parts and service to pay the overhead.  Until Titan starts improving parts and service revenues their chance of surviving will be in question.  I came by the Redwood Falls empty building, a couple of weeks ago, which is for sale now.  From the outside, it seems to be quite elaborate, probably was over done, for the sales area that they represented.

Fiscal 2018 Second Quarter Results

Consolidated Results
For the second quarter of fiscal 2018, revenue was $268.9 million, compared to $278.3 million in the second quarter last year. Equipment sales were $167.9 million for the second quarter of fiscal 2018, compared to $173.3 million in the second quarter last year. Parts sales were $55.6 million for the second quarter of fiscal 2018, compared to $58.3 million in the second quarter last year. Revenue generated from service was $30.5 million for the second quarter of fiscal 2018, compared to $31.3 million in the second quarter last year. Revenue from rental and other was $14.9 million for the second quarter of fiscal 2018, compared to $15.4 million in the second quarter last year.