Inside the Charles Schwab thinkorswim mobile app, standalone exit orders require explicit dollar trigger prices rather than dynamic percentages. Here is the exact mental formula to calculate your exits in seconds, along with a checklist to ensure your bracket orders fire correctly.

The 10-Second Mental Math Formula

Whenever you purchase a long call or put contract, keep two static multipliers at top of mind. Instead of running complex percentage subtraction while bids and asks are jumping, multiply your fill price directly:

  • 20% Stop-Loss Trigger: Entry Premium × 0.80
  • 70% Profit Target Limit: Entry Premium × 1.70

No-Calculator Shortcut: The "10% Anchor"

If you prefer mental arithmetic without opening an app, calculate 10% of your premium by moving the decimal point one place to the left, then apply it to your exits:

  • Find your 10% base: On a $0.40 fill, 10% is $0.04.
  • For the 20% Stop: Double the base ($0.08) and subtract it from entry: $0.40 − $0.08 = $0.32.
  • For the 70% Target: Multiply the base by 7 ($0.28) and add it to entry: $0.40 + $0.28 = $0.68.

Rapid Reference Cheat Sheet: -20% vs. +70%

For traders executing standard day-trading brackets in our day trading strategy guides, keep these common contract fill prices bookmarked:

Contract Entry Price 20% Stop-Loss (Sell STP) 70% Target (Sell LMT)
$0.20 ($20/contract) $0.16 $0.34
$0.30 ($30/contract) $0.24 $0.51
$0.40 ($40/contract) $0.32 $0.68
$0.50 ($50/contract) $0.40 $0.85
$0.60 ($60/contract) $0.48 $1.02
$0.75 ($75/contract) $0.60 $1.28
$1.00 ($100/contract) $0.80 $1.70

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Setting Up the 1st Triggers OCO Bracket on thinkorswim Mobile

The safest way to automate this workflow is to construct the exit bracket alongside your entry order using thinkorswim's 1st Triggers OCO (One-Cancels-Other) mechanism. This prevents you from entering conflicting orders or accidentally getting filled on naked short options.

  1. Select Your Strike: On the option chain, tap the Ask price of the contract you want to buy.
  2. Build the Bracket: Scroll to the bottom of the order editor and select Create Advanced Order, then toggle the order template to 1st Triggers OCO.
  3. Configure the Profit Leg: Set Order #2 to SELL with an order type of LMT (Limit). Enter your 70% target price (Entry × 1.70) and set Time-in-Force to GTC (Good 'Til Canceled).
  4. Configure the Risk Leg: Set Order #3 to SELL with an order type of STP (Stop). Enter your 20% threshold price (Entry × 0.80) and ensure the duration is also set to GTC.

Three Common Mobile Execution Pitfalls to Avoid

Order ticket errors occur frequently when configuring multi-contingent orders on small touchscreens. Always review the confirmation screen for these three flags:

  • Reversing Order Types: Setting your lower exit as a Limit order instead of a Stop order causes the broker to execute immediately at current market bids, closing your position at a loss within seconds of entry. For regulatory definitions on stop mechanics, refer to the SEC Investor Guide on Order Types.
  • Negative or Mismatched Quantities: Double-check that your exit legs reflect the exact contract quantity you are long (e.g., selling 1 to close 1). Do not let auto-fill fields insert default batch sizes like -10.
  • Leaving Duration on DAY: On weekly contracts, an exit order marked "Day" expires at the 4:00 PM EST bell. Setting every bracket leg to GTC ensures your protective stops and limits remain active overnight.

Important: Mastering speed on the mobile trade screen requires practicing these inputs before market open. If you are refining your setup, trade in the paperMoney simulator on Charles Schwab thinkorswim until calculating and routing 20/70 brackets becomes second nature.