How to Instantly Notify Users of Broker Platform About Critical Margin Risks via Phone Calls with PushCall
Use case
You are running a brokerage or trading platform where clients actively trade stocks, cryptocurrencies, or derivatives.
Certain VIP users require immediate notification if their margin ratio reaches dangerous levels — faster than emails, push, or even SMS.
With PushCall, you can instantly alert them via phone call the moment the threshold is crossed.
Typical messages in such cases:
- "Your account's margin ratio has reached as high as 96%. Please immediately top up..."
- "Your account's margin ratio is too high. Please consider depositing ..."
In this setup, the incoming call itself signals urgency, while the caller ID (set dynamically) helps users recognize the event type without needing a spoken message.
How to setup
- Go to the PushCall website and Sign In or register.
- Scroll to the How to use section.
- Generate your Webhook URL by entering your VIP users' phone number in international format.
- Configure your platform to trigger a PushCall webhook when a user's margin ratio crosses the critical threshold.
- Set a specific Caller ID depending on the type of alert:
- Caller ID 1 — Margin alert
- Caller ID 2 — Liquidation risk
- Caller ID 3 — Maintenance margin alert
- etc.
Example API call:
https://pushcall.me/api/call?api_key=xxxxxxxxxx&from=xxxxxxxxxx&to=xxxxxxxxxxx
You can define up to 5 different Caller IDs for different types of events.
Why phone calls?
- Immediate attention: a ringing phone is impossible to ignore, even during sleep.
- No wait for push delivery or email checks.
- Clear event type: Caller ID informs about the event without needing a voice message.
- Works even if notifications are disabled on the user's smartphone.
Phone call notifications are especially effective for high-value clients managing large positions who cannot afford delays.
How it works
- Your system triggers an HTTP request to the PushCall webhook API.
- PushCall instantly places a call to the user.
- No audio is played — the incoming call itself is the alert.
- The user can save the PushCall numbers in contacts as "Margin Alert" or "Trading Alert" for easier recognition.
- The call auto-hangs in 10–30 seconds or upon answering.
- Calls are free for the recipient.
Combine with Push, Telegram or other IM
For extra reliability:
- Send a Push Notification with detailed info.
- Trigger a Telegram message with the full alert text.
- Use the phone call as the first, most urgent signal.
This way, VIP users will have both a call (for instant reaction) and the details via their preferred app.