Matthew, Regarding the DOW support and 10,410 area:

I think you are right on. You must go back to April and 
take a closer look at the volume:

  Date     Open     High    Low    Close   Volume    
22-Apr-99 10735.8 10896.4 10517.9 10727.2  9,279,000  
21-Apr-99 10462.6 10702.6 10309.1 10581.4  9,200,000  
20-Apr-99 10440.5 10610.1 10212.9 10448.6  9,854,000  
19-Apr-99 10566.1 10879.8 10284.4 10440.5 12,144,000 
16-Apr-99 10497.3 10632.9 10299.6 10493.9 10,023,000 
15-Apr-99 10411.7 10673.9 10201.3 10462.7 10,898,000 
14-Apr-99 10436.9 10692.5 10196.9 10411.7  9,520,000  
13-Apr-99 10340.6 10512.1 10239.3 10395    8,109,000  
12-Apr-99 10094.2 10384.5 10042   10339.5  8,108,000  
09-Apr-99 10166.6 10298.7 10035.1 10173.8  7,161,000 
08-Apr-99 10083.9 10282.6  9980.7 10197.7  8,505,000  
07-Apr-99 10023.4 10166.6  9860   10085.3  8,164,000  
06-Apr-99  9985.7 10097.3  9862.5  9963.5  7,875,000  
05-Apr-99  9893.8 10080.9  9826.4 10007.3  6,958,000 
01-Apr-99  9825.3  9927.7  9707.9  9832.5  7,030,000  
31-Mar-99  9968.2 10025.1  9744.8  9786.2  9,243,000  

April 15, 16, and 19 rank as 3 of the 9 most hevily traded
days ever recorded on the NYSE. As you can see, the DOW traded
b/w 10,440 and 10,493. Underneath this level you see significantly 
lower volume and the break of the DOW.

Best, J.T.