.ticker {
    margin: 0 auto;
    width: 100%;
    text-align: left;
    position: relative;
    overflow: hidden;
    color: RED;
    font-size:25px;
}

.ticker ul {
    width: 100%;
    position: relative;
}

    .ticker ul li {
        width: 100%;
        height: 50px;
        display: none;
    }

div.ticker {
    margin: 0px auto;
}

div.ticker ul {
    margin: auto;
}