Hello Stroke...

Sideway market it's one of the most fun to trade.
Indicators to use would be supports and resistances.
reversal candlesticks and RSI.

Go long when it bounce from a support.
with RSI at oversold level

Go short when it bounce from a resistance.
with RSI at overbought level.

When a support or resistance it's broken with a heavy volume, then we have a possible new trend... Depending what got broken, it's the nature of the position to enter... Breaking a resistance means go long,, and breaking a support means go short.

Either way the market moves,,, Profits can be made.. Up.. Down, Sideways...

Good luck! Good trade!

-Daniel