Hahahaha...
Thank you Spogg Sir, Tulamide Sir and Adamszabo Sir. Adamszabo Sir's concept is matching with my thinking.
What I am asking for is a predefined volume curved that is synced. In FL Studio using Gross beat or Love filter we can make Side chain from scratch and it's completely user customizable. But the Nicky Romero Kick Start is just a preset of Volume curved or a kind of Tempo Synced LFO. Most importantly it consumes very low CPU as a VST Plugins.
So I guess it is not like the so called Compressor with SC input etc.
However,I understood the theory but my point is.............................................
How can I do it Practically in Flowstone?Frankly, I don't understand Flowstone very well. Imagine I am your student and you all my sirs.