Paper trading lets you run a strategy at real market prices without risking real money. It is one of the most useful tools you have before going live. It also flatters you a little, in two predictable places: slippage and fees.
This article looks at those two gaps closely, so you can read your paper results for what they are.
What paper trading gets right
Paper trading is good at showing you how a strategy behaves. With Atheron Trading, you can watch:
- Which trades the bot takes, and the explanation it gives for each one.
- How often both AIs agree, the one reading charts and the one reading news and social posts.
- Whether your rules hold. Your budget, stop-loss and coin list are checked before every trade, paper or real.
- How often your stop-loss is hit, and what that feels like on screen.
That is real information. If your rules are set badly, paper trading will usually show you before your money does.
Gap one: slippage
Slippage is the difference between the price you expected and the price you actually got.
A real order has to meet a real seller or buyer. When you buy, you take the best offers on the order book. If your order is larger than what is sitting at the best price, the rest fills at the next price, and the next. The more you buy relative to what is available, the further the average price moves against you.
Time matters too. Between the moment a trade is decided and the moment it fills, the price can move. In a calm market that movement is tiny. In a fast market, during big news or a sharp drop, it can be large.
A pretend order does none of this. It takes nothing off the order book, so nobody reacts to it, and it does not have to wait in line. That is why paper fills tend to look cleaner than real ones.
Slippage hits hardest when:
- The asset trades thinly, with few orders near the current price.
- Your order is large compared with the volume at the best prices.
- The market is moving quickly.
- A stop-loss triggers during a sharp fall, when many people are selling at once.
That last point deserves attention. A stop-loss sets the price where you want out. In a fast fall, the real exit can land below it.
Gap two: fees
Every real trade on an exchange costs a fee, and most strategies trade more than once. A round trip, buying and then selling, pays twice.
Each fee looks small on its own. The total depends on how often you trade. A strategy that trades rarely barely notices fees. A strategy that trades often can see a large share of its gains go to the exchange. Paper results that look slightly positive can turn flat or negative once real fees are counted.
Fees also depend on your exchange and on how your order is placed. Many exchanges charge differently for orders that add to the order book and orders that take from it. Your exchange's fee schedule tells you the exact rates.
Table: What paper trading shows and what it misses
| Question | Paper trading | Real trading |
|---|---|---|
| Do my rules work as set? | Shows it well | Same rules apply |
| How often does the bot trade? | Shows it well | Same |
| What price do I really get? | Usually too clean | Includes slippage |
| What does each trade cost? | Often understated | Every fee is charged |
| How do I react to a loss? | Pretend money, less pressure | Real money, real pressure |
Reading your paper results honestly
Treat a paper result as a best case, not a forecast. A few habits help:
- Count the trades. More trades means more fees and more chances for slippage. Multiply your round trips by your exchange's fee rate and subtract it.
- Check the coins. If your coin list includes thinly traded coins, expect real fills to be worse than paper fills.
- Look at the stop-loss exits. Ask what would have happened if each one had filled a little lower.
- Start small when you go live. A small real budget shows you the true cost of trading without much at stake.
The part paper trading cannot show at all
There is one more gap, and it is about you. Watching pretend money fall is easy. Watching your own money fall is not. Some people change their rules mid-trade once real money is involved. Paper trading cannot test that. The only fix is to decide your rules in advance and keep your real budget to an amount you can afford to lose.
Where this leaves you
Until launch, Atheron Trading trades with paper money only. Use that time well. Learn how the bot explains its decisions, tune your budget, stop-loss and coin list, and keep a rough tally of the trades it takes. When you move to real money, you will know which parts of your paper results to trust, and which to discount for slippage and fees.
You can read more about how the bot works on Atheron Trading.
