{"product_id":"the-margin-calculator","title":"Position Size \u0026 Trade Journal Workbook","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eAn Excel workbook with a stock sizer, an options sizer (long, debit spread, credit spread — sized by max loss), a 200-row trade journal that computes R automatically, and a dashboard that reads the journal and reports win rate, average win and loss, and expectancy overall and by setup. The core guides teach the math; this is the tool that does it every day.\u003c\/span\u003e\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54277635670384,"sku":null,"price":9.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/chartcraft.org\/products\/the-margin-calculator","provider":"Chart Craft","version":"1.0","type":"link"}