Historic data 
Array
(
    [0] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100826
        )

    [1] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100827
        )

    [2] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100828
        )

    [3] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100829
        )

    [4] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100830
        )

    [5] => Array
        (
            [0] => 100
            [1] => 0
            [2] => 0
            [3] => 20100831
        )

)