損益計算
売買差と手数料後の損益・利回り。
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FAQ（5）
Are fees percentages?
Yes — enter buy/sell fee rates as percent of notional. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. Results are estimates only and not financial advice.
Does it support short selling?
It assumes a long buy-then-sell; invert prices carefully for shorts. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. Results are estimates only and not financial advice.
Is this trading advice?
No — a simple P/L worksheet only. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. Results are estimates only and not financial advice.
Currency?
Unitless numbers; keep buy and sell in the same currency. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. Results are estimates only and not financial advice.
Privacy?
All math is local. LocalKit processes everything locally in your browser—nothing is uploaded and no account is required. Results are estimates only and not financial advice.