Pixel lensing rates for M31 using the CFHT ﹩12\mathrm{k}\,\times 8\mathrm{k}\,﹩ CCD. Top left: Peak threshold trigger with ﹩Q_{0}=7﹩. Top right: Improved peak threshold trigger, also with ﹩Q_{0}=7﹩. Bottom: Improved peak threshold trigger with ﹩Q_{0}=42﹩, 6 times larger than the other cases. The spacing of observations is 1 day.