Elliott Waves works in every timeframe, from short-term Tick-Charts till Charts over decades, as long the analysed market

• is not manipulated and
• has high trading volume

You can trade with Elliott Wave also intraday short market movements, but you need the patience to wait for your setups.

And due to the complexness of the Rules, most of the Elliott Wave fans (me included) do not have the full ruleset in mind and make errors. That's why different interpretations are possible.

Glenn Neely from NEoWave added around 20 years ago additional rules to the Elliott rule set. https://www.amazon.de/Mastering-Elliott-Wave-Presenting-Forecasting/dp/0930233441/ref=sr_1_1?ie=UTF8&qid=1481285334&sr=8-1&keywords=Glenn+Neely