Where in the settings can I find the "Last Size Extra Decimal" option?

The "Last Size Extra Decimal" option is located in the Stock Preset settings section in Trader Workstation, IBKR Desktop, and IBKR Mobile.

Steps in:

Trader Workstation

  1. Go to Edit then select Global Configuration
  2. Expand Presets and select Stocks
  3. Scroll down on the right to the Display Settings section and expand it
  4. Find Last Size Extra Decimals
  5. Use the dropdown to select the number of decimal places (1-6)
  6. Click Apply or OK to save

IBKR Desktop

  1. Click the gear icon (Settings) in the bottom left corner
  2. Go to Trading then Stocks (under Trading Presets)
  3. Scroll down to the Display Settings section
  4. Find Last Size Extra Decimals
  5. Use the dropdown to select your preference:
    • None (default) - displays whole numbers only
    • 1 to 6 - displays trade sizes with your chosen number of decimal places
  6. Click X on top right corner of the Preferences window to close it

IBKR Mobile (Anroid and iOS)

  1. Tap the hamburger menu (top left corner)
  2. Go to Settings then Trading Settings followed by Trading Presets and choose Stocks
  3. Tap Size
  4. Find Last Size Extra Decimals
  5. Enter 1 to 6 - displays trade sizes with your chosen number of decimal places
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