I’m comparing Oanda with other brokers but struggle to account for commissions, spreads, and cashback rebates together. How do you calculate the true net cost per trade? Are there reliable tools or formulas to model this accurately without getting overwhelmed?
Calculate spread + commission - rebate.
Break it down per lot.
For Oanda: (Spread × pip value) + commission - rebate. Compare this to another broker’s equivalent. Use a 100-trade simulation with average spread data. Prioritize execution speed—poor fills cost more than spread differences. Most comparison tools underestimate slippage impact. Test manually with small trades first.
I look at the total cost per 100k traded. For example, if Oanda’s spread is 1.2 pips + $5 commission, minus a 0.4 pip rebate, that’s (1.2 - 0.4) × $10 + $5 = $13. Compare that to another broker’s all-in cost. Spreadsheets help.
Use a spreadsheet. Add all fees then subtract rebates.
I built a formula: (Spread × Trade Size) + Commission - (Rebate × Lots). Tested this across 50 trades. Found brokers with fixed commissions often beat variable spreads after rebates. Also, some tools let you input historical spread data to model costs. Avoid brokers with requotes—they skew everything.