You change brick size, its something similar to changing time period on regular charts.
Use lower brick size, you get more reversals ( of shorter moves, of course)
for every stock brick size is not same.
Renko is timeless, a new brick will print, red or green only when price moves by certain amount depending on brick size.
when scrip is in congestion, no new bricks (depending on brick size), but when trending, bricks form rapidly