Basic Backtest Function for Matlab

[pnl,pnlvector, sh]= backtestlongAmount(data,signal,buyprice,delay,amount$$);

This is a very basic function for backtesting a strategy in Matlab.
All you need is a vector with 1s for Buy, -1's for Sell and 0's for Hold.

To use it we need
1. A vector of prices,i.e. SPY close prices
2. Signal: A vector of  1 for BUY, -1 for SELL and 0 for HOLD
3. Buyprice: A vector of Close prices if we buy at close or Open prices if we buy at Open
4. Delay: 0 if we buy "Today" - 1 if we buy tomorrow. So to Buy Tomorrow on Open:
4. Amount :i.e., 100,000


Please report any bugs or inaccuracies you find. Improvements are welcome.

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