Projects / Stock Predictor

Stock Predictor (Marketstack + OpenAI)

Enter a stock symbol (e.g., TSLA, AAPL, GOOGL) to fetch last EOD data and get closing price estimate.

Data: Marketstack AI: OpenAI

Type a symbol above and press Predict to see the result.

How the Stock Predictor works

Overview

Plain-English workflow:
🔎 Input: You enter a stock symbol (e.g., TSLA).
⬇️ Data fetch: App pulls recent EOD (end-of-day) data from Marketstack API.
📝 Prompt build: It writes a compact prompt + series into prediction.txt.
🤖 Model call: Sends that text to an AI model (OpenAI) asking for a single number (next 5 trading days closing estimate).
📤 Parse & show: Reads the model’s single numeric answer and displays it as the prediction.
📊 Context: A small sample table shows recent EOD rows for reference.
What this doesn’t do:
❌ No fundamentals, no news, no macro data.
❌ No real trading signals or risk management.
❌ Not a backtested strategy; it’s a toy predictor for learning.

Important: Educational demo only — not financial advice. Do not make investment decisions solely based on this prediction. Markets are volatile and the model can be wrong.

Notes: Requires environment variables MARKETSTACK_API_KEY and OPENAI_API_KEY. API rate limits and latency may affect response times. If symbols return no data, check ticker, exchange, or your API plan.