## Ergodic TSI2

Ergodic TSI2 (ETSI2) was authored by William Blau. The ETSI2 uses price and previous price, with differences and absolute differences, in a series of exponential moving averages (EMA’s) to arrive at its ergodic oscillator values. A signal line which is an EMA of ESTI is also given. The user may alter the input (close), method (EMA) and period lengths. This indicator’s definition is further expressed in the condensed code given in the calculation below. ### How To Trade Using Ergodic TSI2

Although a signal line is plotted, no trading signals are calculated for this indicator.

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### Calculation

//input = price, user defined, default is close
//period1 = user input, default is 21
//period2 = user input, default is 9
//period3 = user input, default is 9
//period4 = user input, default is 17
//period5 = user input, default is 6
//period6 = user input, default is 2
//sPeriod = user input, default is 2
//method = moving average (ma), user defined, default is EMA
//prev = previous, abs = absolute value
//index = current bar number

```etsi = 0;
prevP = price[index-1];
priceD = price - prevP;
absPriceD = Math.abs(price - prevP);
ma1 = ma(method, index,  period1, priceD);
aMa1 = ma(method, index, period1, absPriceD);
ma4 = ma(method, index, period4, priceD);
aMa4 = ma(method, index, period4, abdPriceD);
ma2 = ma(method, index, period2, ma1);
aMa2 = ma(method, index, period2, ama1);
ma5 = ma(method, index, period5, ma4);
aMa5 = ma(method, index, period5, aMa4);
ma3 = ma(method, index, period3, ma2);
aMa3 = ma(method, index, period3, ama2);
ma6 = ma(method, index, period6, ma5);
aMa6 = ma(method, index, period6, aMa5);
Plot1: etsi2 = (100 * ma6) / aMa6;
Plot2: etsi = (100 * ma3) / aMa3;
Plot3: sig = ma(method, index, sPeriod, esti);```