Chart, not the whole tab
The capture is clipped to the candle area and skips the trading ticket when that panel is open.
Chrome extension
AI chart analysis Chrome extension for TradingView
Open a candlestick chart, click SignalLens, and get a direction, entry, stop, and risk-reward you can edit. The free plan covers 3 analyses a day. A key you add talks to the provider directly.
How it works
Open the chart
TradingView or a supported exchange page. The drawer stays closed until you click the toolbar icon.
Start the analysis
SignalLens crops the candlestick area. If that area is not found, nothing is uploaded.
Read the plan
Direction, entry, stop, and a slider that recomputes take-profit. You copy the numbers and place any order yourself.
What you get
Timeframe-aware mode
Under 4H is treated as a scalp read. 4H and above is a swing read. A 60-minute chart stays 1H.
Local history
The last 20 results stay in the browser as small JPEG thumbnails.
Free plan and your own key
Free · 3 a day
No signup. Analyses run through SignalLens and use our key. The limit is 3 successful analyses per UTC day for your install and for the network address. When it is used up, the drawer asks you to add a key.
Your key · the eight providers
Save a key in the extension settings. The chart goes from your browser straight to the provider you choose. Where a provider offers both a China endpoint and an international endpoint, those keys are not interchangeable. The key is stored only on the device.
Supported AI providers
Each default model can read a chart image. DeepSeek’s older text-only ids, and text-only GLM ids, cannot. You can edit the model name.
| Provider | Default model | Official API |
|---|---|---|
| OpenAI | gpt-4.1-mini | api.openai.com |
| Anthropic (Claude) | claude-sonnet-5-5 | api.anthropic.com |
| Google Gemini | gemini-3.8-flash | generativelanguage.googleapis.com |
| DeepSeek | deepseek-flash | api.deepseek.com |
| Moonshot Kimi | kimi-k3 | api.moonshot.ai · api.moonshot.cn |
| MiniMax | MiniMax-M3.1-Flash | api.minimax.io · api.minimaxi.com |
| Zhipu GLM | glm-4.6v | api.z.ai · open.bigmodel.cn |
| OpenRouter | openai/gpt-4.1-mini | openrouter.ai |
Questions
Does SignalLens place trades?
No. It never connects to an exchange account, and the action button only copies parameters for you to enter yourself.
What happens after 3 free analyses?
The server stops the free plan until the next UTC day. You can add your own provider key and keep going. That path does not use our quota.
Where is my API key stored?
In chrome.storage.local on your browser. SignalLens does not receive it. Clearing the key returns you to the free plan.
Which providers are supported?
Eight providers. The homepage lists each one with its default model and official host. You use one key, and the chart goes directly to that provider.
Is this financial advice?
No. The output is an algorithmic reading of a chart. Crypto trading can lose money. You decide whether to act.