Position Sizing

Risk per Trade
Account size - 100.000 $
Risk Percentage - 2%

Risk per Trade = Account size * Risk Percentage
Risk per Trade - 2000

The Percent Risk Model
Pip Value - 10 $
Close Price - 90 $
Stop Loss - 91$
Profit Target -88$

Risk per Contract = Pip Value * (Close Price - Stop Loss)
Risk per Contract - 1000 $

Number od Contract = Risk per Trade / Risk per Contract
Number od Contract - 2

The % Volatility Model
Pip value - 10
ATR - 255

Volatility($) = ATR * Pip Value
Volatility - 2550

Units = Risk per trade/ Volatility($)
Units - 0