How to Assign a Value/Price to an Event

Assigning values to your events helps Meta optimize ad delivery and measure ROI. PixelFlow lets you attach prices and values to events like Purchase, Lead, and AddToCart through multiple methods depending on your setup.

Set Your Default Currency

Start by configuring your site-wide currency in the PixelFlow dashboard:

1. Go to Dashboard → Sites

2. Click Edit on your site or Add Site for new sites

3. Enter your currency code (e.g., USD, EUR, GBP) in the currency field

4. Click Save

This currency applies to all events unless you override it per event using the methods below.

Method 1: Extract Values from URL Parameters

Best for thank-you pages or order confirmations where the price appears in the URL (e.g., /thank-you?total=99.99).

1. In your dashboard, go to Sites and click Edit on your site

2. Click Add URL or edit an existing URL pattern

3. Paste your URL pattern (e.g., /order-confirmation)

4. Select your event type (e.g., Purchase)

5. Toggle on "Extract data from URL parameters?"

6. In the mapping dropdown, select your URL parameter name (e.g., price or total) and map it to value

7. Click Save

PixelFlow will automatically extract the value when the page loads and include it in the event payload sent to Meta.

Method 2: Use CSS Classes on Form Fields

Ideal for checkout forms or lead forms where users enter a price or value.

Add the CSS class info-val-pf to any input field containing the value:

<input type="text" class="info-val-pf" value="99.99">

When the event fires (e.g., on form submission), PixelFlow reads the field value and attaches it to the event.

To override currency per field, use info-currency-pf:

<input type="hidden" class="info-currency-pf" value="GBP">

Method 3: Enable Auto-Extract for E-commerce

For Webflow or Squarespace sites with native e-commerce, PixelFlow can automatically pull values from your cart and checkout pages.

1. Go to Dashboard → Sites → Edit

2. Scroll to Advanced Setup → E-commerce

3. Toggle on Auto-extract for Purchase or InitiateCheckout events

4. Click Save

PixelFlow will detect product prices, cart totals, and currency from your e-commerce platform's data layer.

Method 4: Track Values with the JavaScript API

For complete control or custom flows (e.g., dynamic pricing, subscriptions), use the PixelFlow JavaScript API:

window.pixelFlow.trackEvent("Purchase", {
  value: 99.99,
  currency: "USD",
  contents: [
    { id: "prod_123", quantity: 1, item_price: 99.99 }
  ],
  num_items: 1
}, {
  em: "[email protected]",
  fn: "Jane",
  ln: "Doe"
});

This method works on any page or trigger (button clicks, AJAX completions, etc.). Learn more in the Programmatic Tracking API guide.

Method 5: Custom JavaScript Extraction

For platforms like ClickFunnels or custom checkouts, write a script to extract the value from your page's data layer or DOM:

<script>
(function () {
  // Example: Extract order total from localStorage
  var checkoutData = JSON.parse(localStorage.getItem("cf_checkout_details"));
  var orderTotal = checkoutData ? checkoutData.products_total_price : 0;

  // Track Purchase event with extracted value
  window.pixelFlow.trackEvent("Purchase", {
    value: orderTotal,
    currency: "USD"
  });
})();
</script>

Place this script on your confirmation page after the PixelFlow script loads.

Verify Values in Meta Events Manager

After setting up values, check that they're being sent correctly:

1. Open Meta Events Manager and select your pixel

2. Go to Test Events

3. Complete a test transaction or form submission on your site

4. Look for your event in the Test Events feed

5. Expand the event and confirm value and currency appear in the parameters

Which Method Should You Use?

• URL parameters: Best for simple thank-you pages with prices in the URL

• CSS classes: Perfect for lead forms or single-product checkouts

• Auto-extract: Easiest for Webflow/Squarespace e-commerce sites

• JavaScript API: Required for custom flows, dynamic pricing, or events not tied to page loads

• Custom scripts: Use when your platform stores order data in a proprietary format

For more details on event parameters, see Event Specific Parameters and Introduction to Event Parameters.