It does not have volume, e.g. 0.01, 0.02.

Does it gives a hint for what is the trend, to buy or sell?

1% or 2% of capital for a position.

I think that Risk (%) is better than Risk (Vol). This is  principle of risk management, compound interest.

When you analyze to find where entry, stop loss, take profit then use my EA to setup your trading.

My EA auto calculate by your setting with drag drop to fast then you can mange by your manual.