detect previous 3 candles close price

I want to check for valid entrys on previous 2 candles and current f.ex.

--------
3 | 1.86
--------
2 | 1.87
--------
1 | 1.88  = new candle
--------

Buy if candle 3 < as candle 2 and new candle is higher as candle 2

1x blue 2x red = sell

the new bar is calculated by new bar open price which should be above the close price of candle 2 and the new bar direction is up

in PHP something like below ... but I need this with the last candle price varibables

if($candle[0]< $candle[1] AND $candle[2] > $candle[1]) 
{
 $buycheck = true;
}