** S&P 500 snaps 3-week win streak, though just inches lower by 0.08%. This as 155 cos prepare to report results next week, the busiest period of Q1 earnings season ** Indeed, the SPX is almost there in terms of a new high , and Nasdaq is also nearing its high hurdle ** But given weak flow, there's risk the advance may run dry . This as the NYSE Composite's tepid breakout looks challenged ** And an evil twin may rear its ugly head, just as the Dow Futures try to get back on trac