How to make and/or understand P&L results with an ETF with "contracts"?

[Bobbydigital83]

So I ran some backtesting on a strategy using a ETF and I am confused by how can i make the "contracts" amount to make sense with a non futures instrument. Do I simply enter a cash value starting amount instead of "contracts" when backtesting the P&L of a non futures instument? I am confused.

 

[rad14733]

No... Contract size is determined by the security being traded... A contract could be 100, 1,000, 10,000 shares depending on the class of security... Entering a dollar amount would most likely return an error... What does clicking on the "?" button reveal...???