diff --git a/README.md b/README.md
index 4cd8db6..c474814 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,18 @@ A Python-based CLI tool that simulates Bitcoin trading using a 'Golden Cross' mo
 pip install -r requirements.txt
 ```
 
+## Troubleshooting Installing Errors
+
+If you run into issues during installation, please refer to our troubleshooting guides:
+- [Detailed Troubleshooting Guide](troubleshooting.md)
+- [Alternative Troubleshooting Reference](trobshooting.md)
+
+### Common Fixes
+
+- **ModuleNotFoundError:** Ensure you are installing the requirements in the correct Python environment.
+- **pytest Command Not Found:** Run tests with `python -m pytest` instead of just `pytest`.
+- **venv installation errors:** Never add standard library modules like `venv` to `requirements.txt`.
+
 ## Usage
 
 Run the simulation script with default settings (60 days, $10k initial cash):
diff --git a/troubleshooting.md b/troubleshooting.md
new file mode 100644
index 0000000..1330847
--- /dev/null
+++ b/troubleshooting.md
@@ -0,0 +1,113 @@
+# Troubleshooting Installation Errors
+
+This guide provides solutions to common installation and environment setup errors encountered when running the **Bitcoin Trading Simulation** or the C++ experimental projects in this repository.
+
+---
+
+## 1. Python Environment & Dependency Issues
+
+### Error: `ModuleNotFoundError: No module named '...'` (e.g., `requests`, `pandas`, `numpy`, `pytest`)
+This happens when the required third-party Python modules are not installed in your current active environment.
+
+**Solution:**
+Ensure you install all dependencies using the `requirements.txt` file:
+```bash
+pip install -r requirements.txt
+```
+If you are running tests, ensure `pytest` is installed:
+```bash
+pip install pytest
+```
+
+### Error: `pytest` command not found
+If you run `pytest` and get a "command not found" error, it means the `pytest` executable is not in your system's PATH.
+
+**Solution:**
+You can invoke `pytest` directly through your Python interpreter, which guarantees it runs within the correct environment:
+```bash
+python -m pytest
+```
+
+### Error: `venv` installation failure in CI/CD or via Pip
+If you encounter errors trying to install a package named `venv` via pip, or see a build failure regarding `venv` in `requirements.txt`:
+
+**Solution:**
+Do not list `venv` in `requirements.txt`. `venv` is a standard library module that comes pre-packaged with Python 3. It is not a PyPI package, so trying to install it via `pip` will fail. If it was present, remove it from `requirements.txt`.
+
+### Permission Errors during `pip install`
+If you get permission denied or access errors (especially on Linux/macOS):
+
+**Solution:**
+Avoid using `sudo pip install`. Instead, use a virtual environment (recommended) or install the packages for your user only:
+```bash
+pip install --user -r requirements.txt
+```
+
+---
+
+## 2. Virtual Environment Setup Guide
+
+Using a virtual environment is highly recommended to isolate dependencies and avoid conflicts with other Python projects on your system.
+
+### How to Create and Activate a Virtual Environment
+
+1. **Create the environment:**
+   ```bash
+   python -m venv venv
+   ```
+
+2. **Activate the environment:**
+   - **On macOS/Linux:**
+     ```bash
+     source venv/bin/activate
+     ```
+   - **On Windows (PowerShell):**
+     ```bash
+     .\venv\Scripts\Activate.ps1
+     ```
+   - **On Windows (Command Prompt):**
+     ```bash
+     .\venv\Scripts\activate.bat
+     ```
+
+3. **Install dependencies:**
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+4. **Deactivate when done:**
+   ```bash
+   deactivate
+   ```
+
+---
+
+## 3. C++ Environment & Compilation Errors (e.g., NumberGuess)
+
+The repository contains experimental C++ terminal-based projects (such as `NumberGuess`). If you run into build issues:
+
+### Error: `g++` or `make` command not found
+This occurs when the C++ compiler or building utility is not installed.
+
+**Solution:**
+- **On Debian/Ubuntu:**
+  ```bash
+  sudo apt update
+  sudo apt install build-essential
+  ```
+- **On macOS (via Homebrew or Xcode):**
+  ```bash
+  xcode-select --install
+  ```
+- **On Windows:**
+  Install MinGW or use MSYS2 to obtain `g++` and `make`.
+
+### Input validation infinite loops
+If the terminal-based C++ application goes into an infinite loop upon entering a non-numeric value:
+
+**Solution:**
+Validate user inputs and clear the stream error states properly in the code:
+```cpp
+std::cin.clear();
+std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+```