The higher the MOS (Margin of Safety) the higher potential returns you will make. MOS is the difference between the Share Price and Sticker Price where Sticker Price is the real value of the stock. Think of it like buying $10 bills for $5. You should always look for a deal in the market.
If you see a stocks MOS change but the share price has not changed, what does that mean?
This means the EPS (Earnings Per Share) has changed.
EPS Calculation: Net Income/Outstanding Shares
If the MOS has declined while the Share Price remained the same, this means the EPS has declined which essentially means the Net Income has declined. In other words, the business is becoming less profitable which is a bad sign.
If the MOS has increased while the Share Price remained the same, this means the EPS has increased which essentially means the Net Income has increased. In other words, the business is becoming more profitable which is a good sign.
MOS Calculation: 100%-(Share Price/Sticker Price)