A stop price is an input, not a guaranteed outcome.
For a planned long trade, quantity multiplied by entry minus stop gives the price loss at the chosen stop. For a short, use stop minus entry. A quantity of 25 units, entry at 100 USD and stop at 98 USD produces a planned price loss of 50 USD. The units must match: quantity is units of the asset, not the total dollar value of the position.
Actual execution may differ from that calculation. Coinbase's order-type documentation explains that market orders may fill at multiple prices and that stop-limit protection depends on execution conditions. This is general exchange context, not a description of blockfunded's simulated execution rules. The account's own order and fee rules remain the relevant source for its behavior.
Add costs explicitly and use the correct base.
In the same example, the entry notional is 2,500 USD and the planned exit notional is 2,450 USD. If hypothetical fees were 0.05% on each side, the two fees would total 2.475 USD, or about 2.48 USD. The fee percentage applies to notional in this example, not to the 50 USD stop loss. These rates illustrate the calculation and are not a fee quote for blockfunded or any exchange.
Adding a further 5 USD allowance for adverse slippage brings the total modeled loss to about 57.48 USD. Enter the combined fee and slippage allowance as one cash amount in the risk checker. Coinbase's fee documentation distinguishes maker and taker execution; inspect the actual product's current fee treatment rather than assuming that every limit order receives a maker rate.
Start from current equity. Add only losses and costs that could occur after that snapshot, plus the proposed new trade's modeled downside.
Count only additional losses from current equity.
Current equity already reflects open profit and loss. If an existing position is down 100 USD and could lose another 150 USD before its planned exit, enter 150 USD as additional existing-position loss. Entering the full 250 USD would count the first 100 USD twice. Include future closing costs that are not yet in equity, and leave out fees already paid.
Add the remaining downside of every relevant existing position before checking a new order. Several positions can lose together even when they have different symbols. This combined-loss scenario is not a correlation estimate, portfolio optimisation or a worst-case guarantee. It asks whether the selected exits and cost assumptions fit within the currently configured loss boundaries.
Compare the combined loss with the tighter boundary.
Suppose current equity is 96,000 USD, the daily floor is 95,000 USD, and the maximum floor is lower. There is 1,000 USD of daily room. A new trade with 700 USD planned stop loss appears to fit by itself. Add 100 USD estimated costs and 250 USD further loss on existing positions: the combined loss is 1,050 USD and modeled equity falls to 94,950 USD, below the daily floor.
The updated checker reports the planned stop loss, the combined modeled loss, resulting equity and room to both boundaries. Landing exactly on a configured boundary is also flagged. Zero cost input means zero modeled costs, not evidence of cost-free execution. Review the numbers after a position changes, a fee is booked or a daily reset updates the reference.
- Take one snapshot.Use current equity and the correct start-of-day reference.
- Add forward losses.Include the new stop loss, new-trade costs and remaining open-position risk once.
- Inspect the remaining room.A result inside the modeled limits does not cover unmodeled gaps or guarantee execution.
Tools and execution references
FAQ
Does the checker forecast slippage?
No. You enter a cash estimate; the calculator does not inspect an order book or predict fills.
Should I add current unrealised losses again?
No. If current equity already includes them, add only the further loss from that snapshot.
Are the example fee rates blockfunded rates?
No. They are hypothetical inputs used to explain the arithmetic.
Can a modeled result guarantee a safe trade?
No. It checks selected mathematical assumptions, not execution, market direction or account eligibility.