How to compute annualized Sharpe Ratio from hourly PnLs?

In case you believe your returns don't deviate too far away from being IID, it is suitable to take the hourly PnL time series and multiply it by $\sqrt{q}$, where $q$ is the number of trading hours in a day times the number of trading days in a year.

This assumption can be fairly shaky, in which case I recommend consulting the section on temporal aggregation of Sharpe ratios in this paper: The Statistics of Sharpe Ratios.

The payoff in binomial model is a martingale.

Defining a log spiral from three points

Entire functions of finite order with prescribed zeros

PA├ ∃xP(x) but PA$\nvdash$ P(n) for any n?

Finding all $f:[0, \infty) \to [0, \infty)$ differentiable and convex with $f(0)=0$ and $f'(x)\cdot f\bigl(f(x)\bigr)=x$

The group of invertible matrices with entries in Z

functional equation $ 1= f(x)+\left(\frac x2\right)+\dots+f\left(\frac xN\right) $

Derivation $X^2$-pdf (Chi square) for $k$ degrees of freedom

Mean value of $\Omega(n)$ is $\log\log n$

Prove that the commutator is a Lie bracket in $\mathrm{Lie}(G)$

Determining all $f : \mathbb R^+ \to \mathbb R^+$ that satisfy $f(x + y) = f\left(x^2 + y^2\right)$

Determine the $\sup(A)$ if $A = \{ \frac{(-1)^n}{n}: n \in \mathbb{N} \}$ and prove your result.