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How to trade large number of shares?
You need to negotiate with your broker to allow you to do more exotic order types.  One in particular I recommend is a "hidden" aka iceberg order.  You enter two numbers.  The first is the number of shares for your entire order, the second is the amount that will be displayed in the book (this is the tip of the iceberg, the remaining shares are hidden below the surface). The maker/taker rule applies as follows: The amount displayed will receive the rebate for providing liquidity.  The amount hidden will be charged the fee for taking liquidity. Example: You want to sell 10,000 shares total.  You enter a hidden order for 10,000 shares with 1,000 displayed.  On the level 2 screen traders will see 1,000 shares, and those shares will stay displayed there until the entire order is filled.  You receive a rebate for 1,000 shares, you pay the brokerage fee for 9,000 shares. Also, like one of the previous posters mentioned, only trade high liquidity stocks.  Large market cap companies with high volume.  This is why day traders love Tesla, Amazon, Netflix, etc. Large market cap, high volume, and high volatility.  Easy to catch $10+ moves in price. Hope this helps Happy trading