_tdFATL (Fast Adaptive Trend Line) ? which practically shows the mathematical expectation of Close on any bar; _tdSATL (Slow Adaptive Trend Line) ? The meaning of the SATL indicator is to be mathematical expectation of FATL. The increasing line of SATL corresponds to the bull trend on the market and decreasing SATL corresponds to bear trend; _tdRFTL (Reference Fast Trend line) ? describes a response of the digital filter on the discrete sequence of market prices but with delay equal to Nyquist interval of the filter used in FATL; _tdRSTL (Reference Slow Trend line) ? describes a response of the digital filter on the discrete sequence of market prices but with delay equal to Nyquist interval of the filter used in SATL; _tdFTLM (Fast Trend Line Momentum) ? shows the momentum of FATL and is calculated by equation FTLM = FATL-RFTL; _tdSTLM (Slow Trend Line Momentum) ? shows the momentum of SATL and is calculated by equation STLM = SATL-RSTL. Positive values of the STLM indicator correspond with bull tendency and negative ? to bear tendency on the market; _tdRBCI (Range Bound Channel Index) ? The indicator is calculating by equation RBCI = FATL-SATL. When RBCI go to the maximum, then the market is going to the high bound of the price channel. When RBCI go to the minimum, then the market is going to the low bound of the price channel; _tdPCCI (Perfect Commodity Channel Index) - The indicator is calculating by equation PCCI = Close-FATL for every bar. Describes the difference between close for the any bar and its mathematical expectation.