US ETFs

Stochastic with 34-5-5 settings is the "fast" version of it, and it is used to identify the possible reversals in short-term situation and/or in lower timeframes for example: overbought/oversold market condition in the current market for example. It is used with the other indicators for trading such as 55 SMA, 100 SMA, "medium"/"slow" version of Stochastic and more.

Stochastic with 100-8-8 settings is "slow" version of it, and it is used to identify the possible reversals in long-term situation and/or in higher timeframes for example. And because of that - the indicator with the parameters are used to estimate the possible overbought/oversold market condition in the long-term to confirm, and it should be used with the other indicators for trading for example.

The Stochastic Oscillator with settings 55-8-8 is used to filter out market noise compared to the standard setting. Besides, when the oscillator rises above 80 so it indicates an overbought market condition, and below 20 is indicating the oversold condition. This 55-8-8 setting is better to be used for trend-following strategies as well as the trade during the market reversal situation for example.