Basically we've hit this "downtrend line" with such force that it's likely to break. If you're long I would hold as long as you can to see if this breaks. If you're not in a position I would wait for the break to happen before going long. If you're short: stop shorting uptrends :D
Keep in mind this 3D chart can have some on the lower timeframes, so I would make sure the uptrend is clearly over before going short if this "downtrend line" proves to have any worth.