I agree with Orchidtinkerer that moving it inside and outside will stress it, and likely not get you the result that you seek. They don't need or want to be frozen! If you put it in a cooler area of the house (like near a window) it will still get a bit of nighttime chill without harm (but you don't want it touching a freezing-cold window... back it away a bit). Also reduce watering (don't eliminate it, but you can let it get dry before giving it another drink) and no fertilizer until you see new growth in the spring. (And go light on the fertilizer even then, too much nitrogen will have you growing keikis instead of flowers).
For what it is worth, I have a Dendrobium that turned out to be the species Den. nobile... it was labeled as something else and I had been treating it accordingly, warm in the greenhouse, light fertilizing) This fall (instead of spring) it bloomed, and that is when I identified it. It didn't read the books...
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