Basically bigger labels on 8s and 9s. and low transparency on 1 to 4 candles.
When a 8 or 9 comes up it means the trend is exhausted (the buyers of an uptrend or sellers on a downtrend)
For more in depth information, Search for TD Sequential . this indicator is just the TDS numbers on candles, with no S/R lines and Buy/Sell setups.