AAPL, the most valuable company in the world, looked unstoppable on Friday — as though buyers were ready to jump on the stock no matter how badly the broad averages were getting pounded. It drew strong support on the first bar of the day, when its canny handlers opened the stock $2 beneath the previous day’s close. Now, if it pushes easily past the 176.96 rally target shown, look for the broad averages to hang tough, inspired by AAPL’s stalwart leadership. ______ UPDATE (March 5, 7:26 p.m.): Buyers did not exactly shred a path higher, but they did most of their buying above the red line, shortening the odds of a further rally to the 181.26 target shown. As long as the stock is moving higher, the broad averages will follow.