1. Fetches **live LTP** (last traded price) from a REST API.
2. Executes **mock trades** (BUY/SELL) to an arbitrary broker API (you can later replace with real broker’s API like Zerodha, Upstox, or Fyers).
3. Displays **current price, position, and profit/loss** on a **16x2 LCD (I²C)**.
## ⚙️ Hardware Requirements
| Component | Purpose |
| -------------------------------------------------------- | ------------------------------------- |
| **ESP32 Dev Board** | Wi-Fi + logic control |
| **16×2 LCD with I²C adapter** (uses LiquidCrystal_I2C) | Display price, P/L |
| Optional push buttons | Manual trade triggers (BUY/SELL/EXIT) |

---
## 📦 Arduino Libraries Needed
Install these via Arduino IDE → *Tools → Manage Libraries*:
* **WiFi.h** (comes with ESP32 board package)
* **HTTPClient.h**
* **LiquidCrystal_I2C** (by Frank de Brabander or similar)
* **ArduinoJson** (optional for JSON parsing)

---

## 🧠 Logic Overview

1. Connect to Wi-Fi.
2. Periodically fetch LTP (dummy API or any free stock price API).
3. Keep track of:

* Current position (BUY, SELL, or NONE)
* Entry price
* Profit/Loss = (LTP − entry_price) × quantity
4. Execute trade via mock API call.
5. Show all key values on the 16x2 LCD.

---

## 🧩 Full Sample Code

cpp

/*

 ESP32 Algo Trading Demo with LCD (16x2 I2C)

 -------------------------------------------

 Features:

 - Fetches LTP from dummy API

 - Sends mock buy/sell orders

 - Displays current LTP and P/L on LCD



 Replace BROKER_ORDER_URL with your actual broker endpoint

*/

#include <WiFi.h>

#include <HTTPClient.h>

#include <LiquidCrystal_I2C.h>

const char* ssid = "YOUR_WIFI_SSID";

const char* password = "YOUR_WIFI_PASSWORD";

// Dummy endpoints (replace with real ones)

const char* PRICE_API_URL = "https://api.example.com/ltp?symbol=RELIANCE";

const char* BROKER_ORDER_URL = "https://api.example.com/order";

const char* BROKER_API_KEY = "DUMMY_API_KEY";

// LCD settings

LiquidCrystal_I2C lcd(0x27, 16, 2);

// Trade parameters

String symbol = "RELIANCE";

float entryPrice = 0;

float ltp = 0;

float profitLoss = 0;

String position = "NONE";

int quantity = 10;

// Helper function to fetch latest price

float fetchLTP() {

 if (WiFi.status() != WL_CONNECTED) return 0.0;

 HTTPClient http;

 http.begin(PRICE_API_URL);

 int code = http.GET();

 if (code != 200) {

 Serial.printf("Price fetch failed: %d\n", code);

 http.end();

 return 0.0;

 }

 String payload = http.getString();

 http.end();

 // If payload = plain number like "2543.65"

 float price = payload.toFloat();

 if (price <= 0) {

 // try extracting from JSON: {"ltp":2543.65}

 int p = payload.indexOf(":");

 int e = payload.indexOf("}");

 price = payload.substring(p + 1, e).toFloat();

 }

 return price;

}

// Mock trade execution

void placeOrder(String side) {

 if (WiFi.status() != WL_CONNECTED) return;

 HTTPClient http;

 http.begin(BROKER_ORDER_URL);

 http.addHeader("Content-Type", "application/json");

 http.addHeader("Authorization", String("Bearer ") + BROKER_API_KEY);



 String body = "{\"symbol\":\"" + symbol + "\",\"side\":\"" + side + "\",\"qty\":" + String(quantity) + "}";

 int code = http.POST(body);

 String resp = http.getString();

 http.end();



 Serial.printf("%s order response %d: %s\n", side.c_str(), code, resp.c_str());



 if (side == "BUY") {

 position = "LONG";

 entryPrice = ltp;

 } else if (side == "SELL") {

 if (position == "LONG") {

 float diff = ltp - entryPrice;

 profitLoss += diff * quantity;

 position = "NONE";

 } else {

 position = "SHORT";

 entryPrice = ltp;

 }

 }

}

// Display data > 0) {

 Serial.printf("LTP: %.2f\n", ltp);

 }

 // Simple strategy: Buy below 2500, Sell above 2600 (demo logic)

 if (position == "NONE" && ltp < 2500) {

 placeOrder("BUY");

 } else if (position == "LONG" && ltp > 2600) {

 placeOrder("SELL");

 }

 updateLCD();

 delay(10000); // fetch every 10 sec

}

---
## 🧾 Example Output (Serial Monitor + LCD)
**LCD line 1:** RELIANCE:2560.7
**LCD line 2:** LONG P/L:60.0
**Serial:**

WiFi Connected!

LTP: 2560.70

BUY order response 200: {"status":"ok"}

SELL order response 200: {"status":"ok"}

## 🔐 Integrating a Real Broker

You can adapt the same structure to **any broker with REST APIs** (Zerodha, Fyers, Alpaca, etc.):

| Broker | Auth Type | Docs |
| ------------------- | -------------- | ------------------------------------------------------------------------------------------ |
| **Zerodha Kite** | Token (Bearer) | [https://kite.trade/docs/connect/v3/](https://kite.trade/docs/connect/v3/) |
| **Fyers** | OAuth + Token | [https://myapi.fyers.in/docs/](https://myapi.fyers.in/docs/) |
| **Upstox** | OAuth 2.0 | [https://upstox.com/developer/api/](https://upstox.com/developer/api/) |
| **Alpaca (Global)** | API Key/Secret | [https://alpaca.markets/docs/api-references/](https://alpaca.markets/docs/api-references/) |

You’ll just replace:

* PRICE_API_URL with the broker’s quote endpoint
* BROKER_ORDER_URL with their order endpoint
* Add their specific headers or HMAC signature scheme