# ProFinancialCharts: A new Flutter package! [Currently private]

### Features
- I have built everything from scratch,

- It shows the date/time and price grids,

- Zoom in and out (enlarging candlesticks),

![GIF 002](https://github.com/yasinarik/personal-project-contents/blob/main/ProFinancialCharts/gif_002.gif?raw=true)
*The GIF above is in real-time and the video is not edited.*

#### Auto-fit Vertical Axis (Min & Max Price Visible)

- The chart **auto fits** the vertical axis according to the **lowest** and **highest** values that are **currently visible** to the user. I specifically checked some of the most popular crypto trading/exchange apps like **Binance** and **Woo**. I found out that their candle charts are literally lagging even on the latest iPhones. 

- Creating an auto-fit algorithm is tough but creating a butter-smooth auto-fit algorithm is **really difficult**. I have used a good amount of knowledge about data structures to achieve high scrolling performance.

![GIF 001](https://github.com/yasinarik/personal-project-contents/blob/main/ProFinancialCharts/gif_001.gif?raw=true)
*The GIF above is in real-time and the video is not edited.*

#### Scroll Back Through History

- It can render +10K candle data in view and scroll through them smoothly. (If you know what I mean, in a daily view, 1 candle represents 1 day and 10,000 days back from today ends up at some date in 1993),

![GIF 004](https://github.com/yasinarik/personal-project-contents/blob/main/ProFinancialCharts/gif_004.gif?raw=true)
*The GIF above shows the real-time scrolling and the video is not sped up.*

#### Merge Candlesticks

- It can **merge **candles into one. For example, it can show 7 daily candles as 1 weekly candle **without needing to provide a new dataset**,

![GIF 003](https://github.com/yasinarik/personal-project-contents/blob/main/ProFinancialCharts/gif_003.gif?raw=true)
*The GIF above shows the real-time candle merging and the video is not edited.*