Even in intraday there are a few big moves every day. Each of this moves has a direction and noise. To me noise is every move different from the direction between the start and the end of a move.The lower the timeframe the less likely it is for there to be any meaningful movement, thus the more likely that the move is just noise.
10 tick moves are irrelevant and bad examples. Because if you look at that level noise does not exist if you only watch 2 ticks. From tick 1 to tick 2 is a clear move without any noise. Depending of the example one can proof anything.

