docs: Improve input parameter documentation for TA-Lib functions

- Update method documentation to provide more precise input array type descriptions
- Add detailed explanations for price array inputs, specifying required array types
- Enhance documentation generator to create more informative parameter descriptions
- Clarify input parameter types for various TA-Lib functions

The changes improve the clarity and usability of the library's documentation by providing more specific details about input parameters and their expected types.

Author: Youngv

README.md

@@ -1,11 +1,11 @@
 # TALibFFI
 
 ![Tests](https://github.com/TA-Lib/ta-lib-ruby/actions/workflows/main.yml/badge.svg)
-![Gem Version](https://img.shields.io/gem/v/ta_lib_ffi.svg)
+[![Gem Version](https://badge.fury.io/rb/ta_lib_ffi.svg?icon=si%3Arubygems)](https://badge.fury.io/rb/ta_lib_ffi)
 
 ## Introduction
 
-TALibFFI is a Ruby binding for [TA-Lib](https://ta-lib.org/) (Technical Analysis Library) using FFI (Foreign Function Interface). It provides a comprehensive set of functions for technical analysis of financial market data.
+TALibFFI is a Ruby binding for [TA-Lib](https://ta-lib.org/) (Technical Analysis Library) using FFI (Foreign Function Interface). It provides a comprehensive set of functions for technical analysis of financial market data. This gem is based on the [TA-Lib C headers](https://github.com/TA-Lib/ta-lib/blob/6a07e4ca1877c5ab4b08b81015858bfcbf2ef832/include/ta_abstract.h#L45), providing a Ruby-friendly interface to the underlying C library.
 
 ## Requirements
 
@@ -39,7 +39,7 @@ wget https://github.com/ta-lib/ta-lib/releases/download/v0.6.4/ta-lib_0.6.4_i386
 sudo dpkg -i ta-lib_0.6.4_i386.deb
 ```
 
-### Installing the Ruby Gem
+### [Installing the Ruby Gem](https://rubygems.org/gems/ta_lib_ffi)
 
 Add this to your application's Gemfile:
 
@@ -66,8 +66,20 @@ prices = [10.0, 11.0, 12.0, 11.0, 10.0, 9.0, 8.0, 7.0, 6.0, 5.0, 4.0]
 # Calculate SMA
 puts TALibFFI.sma(prices, time_period: 3)
 # => [11.0, 11.333333333333334, 11.0, 10.0, 9.0, 8.0, 7.0, 6.0, 5.0]
+
+# Average True Range (ATR) Example
+high = [82.15, 81.89, 83.03, 83.30, 83.85, 83.90, 83.33, 84.30, 84.84, 85.00, 85.90, 86.58, 86.98, 88.00, 87.87]
+low  = [81.29, 80.64, 81.31, 82.65, 83.07, 83.11, 82.49, 82.30, 84.15, 84.11, 84.03, 85.39, 85.76, 87.17, 87.01]
+close = [81.59, 81.06, 82.87, 83.00, 83.61, 83.15, 82.84, 83.99, 84.55, 84.36, 85.53, 86.54, 86.89, 87.77, 87.29]
+
+# Calculate ATR with period = 5
+result = TALibFFI.atr([high, low, close], time_period: 5)
+# => [1.101999999999998, 1.0495999999999992, 1.2396799999999994, 1.1617440000000012, 1.1073952000000011, ...]
 ```
 
+## Documentation
+- [API Documentation](https://www.rubydoc.info/github/TA-Lib/ta-lib-ruby/main) - Detailed documentation of all available methods and classes
+
 ## TODO
 - [ ] Add RDoc documentation for Ruby methods
 - [ ] Create detailed function examples with input/output samples