Use continuing when you are speaking about availability that will persist into the future. "Continuing" is the effort make whatever ongoing into the future but may stop any time and for any reason, "continued" refers to picking up where is left and not moving forward and you make it move and keep it going.

Which is correct to be continue or to be continued?

Both are correct.. You can't give preference without having the complete context. The latter is far more common and idiomatic; the trend should continue.

Will be continued Meaning?

phrase. DEFINITIONS1. used for saying that a story will begin again at a later date, starting from the point where it stopped. Synonyms and related words.