interpreting backtest results

hi,

i have assembled a system for stock trading which generated P&L graphs similar to the ones attached (the y axis is arbitary points) for a good range of input parameters; they're choppy but realistic and clearly moving upwards. the graphs are similar for 10/10 of the stocks that i have tested. my question is this: would you consider these good enough to start trading big money? i have never seen a professional trader's P&L graph and so can't compare. (the only ones i have seen are from curve-fitted commercial systems which seem too unrealistic.)

EDIT: i should also mention that out of the 10 stocks that i have tested, no 2 stocks have a correlation coefficient greater than 0.5 (and by correlation i mean the correlation in closing price change as a percentage).

here are graphs for the next 2 stocks that i tested. the way i choose which stocks to test is to type in 2 to 4 random characters for the stock ticker, make sure that they have been around since at least 2000 and then make sure they are not correlated with any of the stocks that i have already tested.