SMI Ergodic Oscillator Strategy

The SMI Ergodic Indicator is the same as the True Strength Index (TSI) developed by
William Blau, except the SMI includes a signal line. The SMI uses double moving averages
of price minus previous price over 2 time frames. The signal line, which is an EMA of the
SMI, is plotted to help trigger trading signals. Adjustable guides are also given to fine
tune these signals. The user may change the input (close), method (EMA), period lengths
and guide values.
You can use in the xPrice any series: Open, High, Low, Close, HL2, HLC3, OHLC4 and ect...

WARNING:
- This script to change bars colors.